chore(release): 8.6.7 [skip ci]

## [8.6.7](https://github.com/parse-community/parse-server/compare/8.6.6...8.6.7) (2026-03-05)

### Bug Fixes

* Malformed `$regex` query leaks database error details in API response (GHSA-9cp7-3q5w-j92g) ([#10102](https://github.com/parse-community/parse-server/issues/10102)) ([07870f5](https://github.com/parse-community/parse-server/commit/07870f59eec03f5c2a5fb1732cb28787ca3f8152))

.releaserc.js

@@ -34,7 +34,7 @@ async function config() {
   console.log(`Running on branch: ${branch}`);
 
   // Set changelog file
-  const changelogFile = `./changelogs/CHANGELOG_${branch}.md`;
+  const changelogFile = `./changelogs/CHANGELOG_release.md`;
   // eslint-disable-next-line no-console
   console.log(`Changelog file output to: ${changelogFile}`);
 
@@ -46,9 +46,8 @@ async function config() {
       'release',
       { name: 'alpha', prerelease: true },
       // { name: 'beta', prerelease: true },
-      'next-major',
       // Long-Term-Support branch
-      'release-8.x.x',
+      { name: 'release-8.x.x', range: '8.x.x', channel: '8.x.x' },
     ],
     dryRun: false,
     debug: true,

changelogs/CHANGELOG_release.md

@@ -1,3 +1,52 @@
+## [8.6.7](https://github.com/parse-community/parse-server/compare/8.6.6...8.6.7) (2026-03-05)
+
+
+### Bug Fixes
+
+* Malformed `$regex` query leaks database error details in API response (GHSA-9cp7-3q5w-j92g) ([#10102](https://github.com/parse-community/parse-server/issues/10102)) ([07870f5](https://github.com/parse-community/parse-server/commit/07870f59eec03f5c2a5fb1732cb28787ca3f8152))
+
+## [8.6.6](https://github.com/parse-community/parse-server/compare/8.6.5...8.6.6) (2026-03-05)
+
+
+### Bug Fixes
+
+* Endpoint `/loginAs` allows `readOnlyMasterKey` to gain full read and write access as any user ([GHSA-79wj-8rqv-jvp5](https://github.com/parse-community/parse-server/security/advisories/GHSA-79wj-8rqv-jvp5)) ([#10099](https://github.com/parse-community/parse-server/issues/10099)) ([0c940b7](https://github.com/parse-community/parse-server/commit/0c940b70891c947fbf6c55536ed95ae300c23350))
+
+## [8.6.5](https://github.com/parse-community/parse-server/compare/8.6.4...8.6.5) (2026-03-05)
+
+
+### Bug Fixes
+
+* File creation and deletion bypasses `readOnlyMasterKey` write restriction (GHSA-xfh7-phr7-gr2x) ([#10096](https://github.com/parse-community/parse-server/issues/10096)) ([07bddc0](https://github.com/parse-community/parse-server/commit/07bddc0850c0eebb51219fe1d5d342f4412461ba))
+
+## [8.6.4](https://github.com/parse-community/parse-server/compare/8.6.3...8.6.4) (2026-03-04)
+
+
+### Bug Fixes
+
+* Cloud Hooks and Cloud Jobs bypass `readOnlyMasterKey` write restriction (GHSA-vc89-5g3r-cmhh) ([#10089](https://github.com/parse-community/parse-server/issues/10089)) ([6c79da9](https://github.com/parse-community/parse-server/commit/6c79da91fc5ec6f2a0bb69a0ca6a886c1585754f))
+
+## [8.6.3](https://github.com/parse-community/parse-server/compare/8.6.2...8.6.3) (2026-02-23)
+
+
+### Bug Fixes
+
+* JWT Algorithm Confusion in Google Auth Adapter ([GHSA-4q3h-vp4r-prv2](https://github.com/parse-community/parse-server/security/advisories/GHSA-4q3h-vp4r-prv2)) ([#10073](https://github.com/parse-community/parse-server/issues/10073)) ([9b94083](https://github.com/parse-community/parse-server/commit/9b94083accb7f3e72c6b8126c195c7a03dd2dfd7))
+
+## [8.6.2](https://github.com/parse-community/parse-server/compare/8.6.1...8.6.2) (2025-12-16)
+
+
+### Bug Fixes
+
+* Server-Side Request Forgery (SSRF) in Instagram auth adapter [GHSA-3f5f-xgrj-97pf](https://github.com/parse-community/parse-server/security/advisories/GHSA-3f5f-xgrj-97pf) ([#9989](https://github.com/parse-community/parse-server/issues/9989)) ([155c6ad](https://github.com/parse-community/parse-server/commit/155c6ad92d2375652c9720d7deed129a9e8f74ff))
+
+## [8.6.1](https://github.com/parse-community/parse-server/compare/8.6.0...8.6.1) (2025-12-14)
+
+
+### Bug Fixes
+
+* Cross-Site Scripting (XSS) via HTML pages for password reset and email verification [GHSA-jhgf-2h8h-ggxv](https://github.com/parse-community/parse-server/security/advisories/GHSA-jhgf-2h8h-ggxv) ([#9986](https://github.com/parse-community/parse-server/issues/9986)) ([12d8b50](https://github.com/parse-community/parse-server/commit/12d8b502a2f99098d177d095842b07d55f62313a))
+
 # [8.6.0](https://github.com/parse-community/parse-server/compare/8.5.0...8.6.0) (2025-12-10)
 
 

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "parse-server",
-  "version": "8.6.0",
+  "version": "8.6.7",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "parse-server",
-      "version": "8.6.0",
+      "version": "8.6.7",
       "hasInstallScript": true,
       "license": "Apache-2.0",
       "dependencies": {

package.json

@@ -1,6 +1,6 @@
 {
   "name": "parse-server",
-  "version": "8.6.0",
+  "version": "8.6.7",
   "description": "An express module providing a Parse-compatible API server",
   "main": "lib/index.js",
   "repository": {

public/de-AT/email_verification_link_expired.html

@@ -14,9 +14,9 @@
 <body>
   <h1>{{appName}}</h1>
   <h1>Expired verification link!</h1>
-  <form method="POST" action="{{{publicServerUrl}}}/apps/{{{appId}}}/resend_verification_email">
-    <input name="token" type="hidden" value="{{{token}}}">
-    <input name="locale" type="hidden" value="{{{locale}}}">
+  <form method="POST" action="{{publicServerUrl}}/apps/{{appId}}/resend_verification_email">
+    <input name="token" type="hidden" value="{{token}}">
+    <input name="locale" type="hidden" value="{{locale}}">
     <button type="submit">Resend Link</button>
   </form>
 </body>

public/de-AT/password_reset.html

@@ -23,11 +23,11 @@
   <p>You can set a new Password for your account: {{username}}</p>
   <br />
   <p>{{error}}</p>  
-  <form id='form' action='{{{publicServerUrl}}}/apps/{{{appId}}}/request_password_reset' method='POST'>
+  <form id='form' action='{{publicServerUrl}}/apps/{{appId}}/request_password_reset' method='POST'>
     <input name='utf-8' type='hidden' value='✓' />
-    <input name="username" type="hidden" id="username" value="{{{username}}}" />
-    <input name="token" type="hidden" id="token" value="{{{token}}}" />
-    <input name="locale" type="hidden" id="locale" value="{{{locale}}}" />
+    <input name="username" type="hidden" id="username" value="{{username}}" />
+    <input name="token" type="hidden" id="token" value="{{token}}" />
+    <input name="locale" type="hidden" id="locale" value="{{locale}}" />
 
     <p>New Password</p>
     <input name="new_password" type="password" id="password" />

public/de/email_verification_link_expired.html

@@ -14,9 +14,9 @@
 <body>
   <h1>{{appName}}</h1>
   <h1>Expired verification link!</h1>
-  <form method="POST" action="{{{publicServerUrl}}}/apps/{{{appId}}}/resend_verification_email">
-    <input name="token" type="hidden" value="{{{token}}}">
-    <input name="locale" type="hidden" value="{{{locale}}}">
+  <form method="POST" action="{{publicServerUrl}}/apps/{{appId}}/resend_verification_email">
+    <input name="token" type="hidden" value="{{token}}">
+    <input name="locale" type="hidden" value="{{locale}}">
     <button type="submit">Resend Link</button>
   </form>
 </body>

public/de/password_reset.html

@@ -23,11 +23,11 @@
   <p>You can set a new Password for your account: {{username}}</p>
   <br />
   <p>{{error}}</p>  
-  <form id='form' action='{{{publicServerUrl}}}/apps/{{{appId}}}/request_password_reset' method='POST'>
+  <form id='form' action='{{publicServerUrl}}/apps/{{appId}}/request_password_reset' method='POST'>
     <input name='utf-8' type='hidden' value='✓' />
-    <input name="username" type="hidden" id="username" value="{{{username}}}" />
-    <input name="token" type="hidden" id="token" value="{{{token}}}" />
-    <input name="locale" type="hidden" id="locale" value="{{{locale}}}" />
+    <input name="username" type="hidden" id="username" value="{{username}}" />
+    <input name="token" type="hidden" id="token" value="{{token}}" />
+    <input name="locale" type="hidden" id="locale" value="{{locale}}" />
 
     <p>New Password</p>
     <input name="new_password" type="password" id="password" />

public/email_verification_link_expired.html

@@ -14,9 +14,9 @@
 <body>
   <h1>{{appName}}</h1>
   <h1>Expired verification link!</h1>
-  <form method="POST" action="{{{publicServerUrl}}}/apps/{{{appId}}}/resend_verification_email">
-    <input name="token" type="hidden" value="{{{token}}}">
-    <input name="locale" type="hidden" value="{{{locale}}}">
+  <form method="POST" action="{{publicServerUrl}}/apps/{{appId}}/resend_verification_email">
+    <input name="token" type="hidden" value="{{token}}">
+    <input name="locale" type="hidden" value="{{locale}}">
     <button type="submit">Resend Link</button>
   </form>
 </body>

public/password_reset.html

@@ -23,11 +23,11 @@
   <p>You can set a new Password for your account: {{username}}</p>
   <br />
   <p>{{error}}</p>  
-  <form id='form' action='{{{publicServerUrl}}}/apps/{{{appId}}}/request_password_reset' method='POST'>
+  <form id='form' action='{{publicServerUrl}}/apps/{{appId}}/request_password_reset' method='POST'>
     <input name='utf-8' type='hidden' value='✓' />
-    <input name="username" type="hidden" id="username" value="{{{username}}}" />
-    <input name="token" type="hidden" id="token" value="{{{token}}}" />
-    <input name="locale" type="hidden" id="locale" value="{{{locale}}}" />
+    <input name="username" type="hidden" id="username" value="{{username}}" />
+    <input name="token" type="hidden" id="token" value="{{token}}" />
+    <input name="locale" type="hidden" id="locale" value="{{locale}}" />
 
     <p>New Password</p>
     <input name="new_password" type="password" id="password" />

spec/Adapters/Auth/instagram.spec.js

@@ -101,6 +101,31 @@ describe('InstagramAdapter', function () {
         'Instagram auth is invalid for this user.'
       );
     });
+
+    it('should ignore client-provided apiURL and use hardcoded endpoint', async () => {
+      const accessToken = 'mockAccessToken';
+      const authData = {
+        id: 'mockUserId',
+        apiURL: 'https://example.com/',
+      };
+
+      mockFetch([
+        {
+          url: 'https://graph.instagram.com/me?fields=id&access_token=mockAccessToken',
+          method: 'GET',
+          response: {
+            ok: true,
+            json: () =>
+              Promise.resolve({
+                id: 'mockUserId',
+              }),
+          },
+        },
+      ]);
+
+      const user = await adapter.getUserFromAccessToken(accessToken, authData);
+      expect(user).toEqual({ id: 'mockUserId' });
+    });
   });
 
   describe('InstagramAdapter E2E Test', function () {

spec/AuthenticationAdapters.spec.js

@@ -500,19 +500,60 @@ describe('google auth adapter', () => {
     }
   });
 
-  // it('should throw error if public key used to encode token is not available', async () => {
-  //   const fakeDecodedToken = { header: { kid: '789', alg: 'RS256' } };
-  //   try {
-  //     spyOn(authUtils, 'getHeaderFromToken').and.callFake(() => fakeDecodedToken);
+  it('should reject forged alg:none JWT from advisory PoC (GHSA-4q3h-vp4r-prv2)', async () => {
+    const header = Buffer.from('{"alg":"none","kid":"nonexistent-key","typ":"JWT"}').toString('base64url');
+    const payload = Buffer.from('{"sub":"the_user_id","iss":"accounts.google.com","aud":"secret","exp":9999999999}').toString('base64url');
+    const forgedToken = `${header}.${payload}.`;
 
-  //     await google.validateAuthData({ id: 'the_user_id', id_token: 'the_token' }, {});
-  //     fail();
-  //   } catch (e) {
-  //     expect(e.message).toBe(
-  //       `Unable to find matching key for Key ID: ${fakeDecodedToken.header.kid}`
-  //     );
-  //   }
-  // });
+    const fakeSigningKey = { kid: '123', rsaPublicKey: 'the_rsa_public_key' };
+    spyOn(authUtils, 'getSigningKey').and.resolveTo(fakeSigningKey);
+
+    try {
+      await google.validateAuthData(
+        { id: 'the_user_id', id_token: forgedToken },
+        { clientId: 'secret' }
+      );
+      fail('should have rejected forged token');
+    } catch (e) {
+      expect(e.code).toBe(Parse.Error.OBJECT_NOT_FOUND);
+    }
+  });
+
+  it('should pass hardcoded RS256 algorithm to jwt.verify, not the JWT header alg', async () => {
+    const fakeClaim = {
+      iss: 'https://accounts.google.com',
+      aud: 'secret',
+      exp: Date.now(),
+      sub: 'the_user_id',
+    };
+    const fakeDecodedToken = { kid: '123', alg: 'ES256' };
+    const fakeSigningKey = { kid: '123', rsaPublicKey: 'the_rsa_public_key' };
+    spyOn(authUtils, 'getHeaderFromToken').and.callFake(() => fakeDecodedToken);
+    spyOn(authUtils, 'getSigningKey').and.resolveTo(fakeSigningKey);
+    spyOn(jwt, 'verify').and.callFake(() => fakeClaim);
+
+    await google.validateAuthData(
+      { id: 'the_user_id', id_token: 'the_token' },
+      { clientId: 'secret' }
+    );
+    expect(jwt.verify.calls.first().args[2].algorithms).toEqual(['RS256']);
+  });
+
+  it('should throw error if Google signing key is not found', async () => {
+    const fakeDecodedToken = { kid: '789', alg: 'RS256' };
+    spyOn(authUtils, 'getHeaderFromToken').and.callFake(() => fakeDecodedToken);
+    spyOn(authUtils, 'getSigningKey').and.rejectWith(new Error('key not found'));
+
+    try {
+      await google.validateAuthData(
+        { id: 'the_user_id', id_token: 'the_token' },
+        { clientId: 'secret' }
+      );
+      fail('should have thrown');
+    } catch (e) {
+      expect(e.message).toBe('Unable to find matching key for Key ID: 789');
+    }
+  });
 
   it('(using client id as string) should verify id_token (google.com)', async () => {
     const fakeClaim = {
@@ -521,8 +562,10 @@ describe('google auth adapter', () => {
       exp: Date.now(),
       sub: 'the_user_id',
     };
-    const fakeDecodedToken = { header: { kid: '123', alg: 'RS256' } };
+    const fakeDecodedToken = { kid: '123', alg: 'RS256' };
+    const fakeSigningKey = { kid: '123', rsaPublicKey: 'the_rsa_public_key' };
     spyOn(authUtils, 'getHeaderFromToken').and.callFake(() => fakeDecodedToken);
+    spyOn(authUtils, 'getSigningKey').and.resolveTo(fakeSigningKey);
     spyOn(jwt, 'verify').and.callFake(() => fakeClaim);
 
     const result = await google.validateAuthData(
@@ -537,8 +580,10 @@ describe('google auth adapter', () => {
       iss: 'https://not.google.com',
       sub: 'the_user_id',
     };
-    const fakeDecodedToken = { header: { kid: '123', alg: 'RS256' } };
+    const fakeDecodedToken = { kid: '123', alg: 'RS256' };
+    const fakeSigningKey = { kid: '123', rsaPublicKey: 'the_rsa_public_key' };
     spyOn(authUtils, 'getHeaderFromToken').and.callFake(() => fakeDecodedToken);
+    spyOn(authUtils, 'getSigningKey').and.resolveTo(fakeSigningKey);
     spyOn(jwt, 'verify').and.callFake(() => fakeClaim);
 
     try {
@@ -561,8 +606,10 @@ describe('google auth adapter', () => {
       exp: Date.now(),
       sub: 'the_user_id',
     };
-    const fakeDecodedToken = { header: { kid: '123', alg: 'RS256' } };
+    const fakeDecodedToken = { kid: '123', alg: 'RS256' };
+    const fakeSigningKey = { kid: '123', rsaPublicKey: 'the_rsa_public_key' };
     spyOn(authUtils, 'getHeaderFromToken').and.callFake(() => fakeDecodedToken);
+    spyOn(authUtils, 'getSigningKey').and.resolveTo(fakeSigningKey);
     spyOn(jwt, 'verify').and.callFake(() => fakeClaim);
 
     try {
@@ -583,8 +630,10 @@ describe('google auth adapter', () => {
       exp: Date.now(),
       sub: 'the_user_id',
     };
-    const fakeDecodedToken = { header: { kid: '123', alg: 'RS256' } };
+    const fakeDecodedToken = { kid: '123', alg: 'RS256' };
+    const fakeSigningKey = { kid: '123', rsaPublicKey: 'the_rsa_public_key' };
     spyOn(authUtils, 'getHeaderFromToken').and.callFake(() => fakeDecodedToken);
+    spyOn(authUtils, 'getSigningKey').and.resolveTo(fakeSigningKey);
     spyOn(jwt, 'verify').and.callFake(() => fakeClaim);
 
     try {
@@ -897,7 +946,27 @@ describe('apple signin auth adapter', () => {
       { clientId: 'secret' }
     );
     expect(result).toEqual(fakeClaim);
-    expect(jwt.verify.calls.first().args[2].algorithms).toEqual(fakeDecodedToken.header.alg);
+    expect(jwt.verify.calls.first().args[2].algorithms).toEqual(['RS256']);
+  });
+
+  it('should pass hardcoded RS256 algorithm to jwt.verify, not the JWT header alg (GHSA-4q3h-vp4r-prv2)', async () => {
+    const fakeClaim = {
+      iss: 'https://appleid.apple.com',
+      aud: 'secret',
+      exp: Date.now(),
+      sub: 'the_user_id',
+    };
+    const fakeDecodedToken = { kid: '123', alg: 'none' };
+    const fakeSigningKey = { kid: '123', rsaPublicKey: 'the_rsa_public_key' };
+    spyOn(authUtils, 'getHeaderFromToken').and.callFake(() => fakeDecodedToken);
+    spyOn(authUtils, 'getSigningKey').and.resolveTo(fakeSigningKey);
+    spyOn(jwt, 'verify').and.callFake(() => fakeClaim);
+
+    await apple.validateAuthData(
+      { id: 'the_user_id', token: 'the_token' },
+      { clientId: 'secret' }
+    );
+    expect(jwt.verify.calls.first().args[2].algorithms).toEqual(['RS256']);
   });
 
   it('should not verify invalid id_token', async () => {
@@ -1236,7 +1305,27 @@ describe('facebook limited auth adapter', () => {
       { clientId: 'secret' }
     );
     expect(result).toEqual(fakeClaim);
-    expect(jwt.verify.calls.first().args[2].algorithms).toEqual(fakeDecodedToken.header.alg);
+    expect(jwt.verify.calls.first().args[2].algorithms).toEqual(['RS256']);
+  });
+
+  it('should pass hardcoded RS256 algorithm to jwt.verify, not the JWT header alg (GHSA-4q3h-vp4r-prv2)', async () => {
+    const fakeClaim = {
+      iss: 'https://www.facebook.com',
+      aud: 'secret',
+      exp: Date.now(),
+      sub: 'the_user_id',
+    };
+    const fakeDecodedToken = { kid: '123', alg: 'none' };
+    const fakeSigningKey = { kid: '123', rsaPublicKey: 'the_rsa_public_key' };
+    spyOn(authUtils, 'getHeaderFromToken').and.callFake(() => fakeDecodedToken);
+    spyOn(authUtils, 'getSigningKey').and.resolveTo(fakeSigningKey);
+    spyOn(jwt, 'verify').and.callFake(() => fakeClaim);
+
+    await facebook.validateAuthData(
+      { id: 'the_user_id', token: 'the_token' },
+      { clientId: 'secret' }
+    );
+    expect(jwt.verify.calls.first().args[2].algorithms).toEqual(['RS256']);
   });
 
   it('should not verify invalid id_token', async () => {

spec/PagesRouter.spec.js

@@ -1180,4 +1180,72 @@ describe('Pages Router', () => {
       });
     });
   });
+
+  describe('XSS Protection', () => {
+    beforeEach(async () => {
+      await reconfigureServer({
+        appId: 'test',
+        appName: 'exampleAppname',
+        publicServerURL: 'http://localhost:8378/1',
+        pages: { enableRouter: true },
+      });
+    });
+
+    it('should escape XSS payloads in token parameter', async () => {
+      const xssPayload = '"><script>alert("XSS")</script>';
+      const response = await request({
+        url: `http://localhost:8378/1/apps/choose_password?token=${encodeURIComponent(xssPayload)}&username=test&appId=test`,
+      });
+
+      expect(response.status).toBe(200);
+      expect(response.text).not.toContain('<script>alert("XSS")</script>');
+      expect(response.text).toContain('&quot;&gt;&lt;script&gt;');
+    });
+
+    it('should escape XSS in username parameter', async () => {
+      const xssUsername = '<img src=x onerror=alert(1)>';
+      const response = await request({
+        url: `http://localhost:8378/1/apps/choose_password?username=${encodeURIComponent(xssUsername)}&appId=test`,
+      });
+
+      expect(response.status).toBe(200);
+      expect(response.text).not.toContain('<img src=x onerror=alert(1)>');
+      expect(response.text).toContain('&lt;img');
+    });
+
+    it('should escape XSS in locale parameter', async () => {
+      const xssLocale = '"><svg/onload=alert(1)>';
+      const response = await request({
+        url: `http://localhost:8378/1/apps/choose_password?locale=${encodeURIComponent(xssLocale)}&appId=test`,
+      });
+
+      expect(response.status).toBe(200);
+      expect(response.text).not.toContain('<svg/onload=alert(1)>');
+      expect(response.text).toContain('&quot;&gt;&lt;svg');
+    });
+
+    it('should handle legitimate usernames with quotes correctly', async () => {
+      const username = "O'Brien";
+      const response = await request({
+        url: `http://localhost:8378/1/apps/choose_password?username=${encodeURIComponent(username)}&appId=test`,
+      });
+
+      expect(response.status).toBe(200);
+      // Should be properly escaped as HTML entity
+      expect(response.text).toContain('O&#39;Brien');
+      // Should NOT contain unescaped quote that breaks HTML
+      expect(response.text).not.toContain('value="O\'Brien"');
+    });
+
+    it('should handle legitimate usernames with ampersands correctly', async () => {
+      const username = 'Smith & Co';
+      const response = await request({
+        url: `http://localhost:8378/1/apps/choose_password?username=${encodeURIComponent(username)}&appId=test`,
+      });
+
+      expect(response.status).toBe(200);
+      // Should be properly escaped
+      expect(response.text).toContain('Smith &amp; Co');
+    });
+  });
 });

spec/index.spec.js

@@ -673,8 +673,10 @@ describe('server', () => {
           exp: Date.now(),
           sub: 'the_user_id',
         };
-        const fakeDecodedToken = { header: { kid: '123', alg: 'RS256' } };
+        const fakeDecodedToken = { kid: '123', alg: 'RS256' };
+        const fakeSigningKey = { kid: '123', rsaPublicKey: 'the_rsa_public_key' };
         spyOn(authUtils, 'getHeaderFromToken').and.callFake(() => fakeDecodedToken);
+        spyOn(authUtils, 'getSigningKey').and.resolveTo(fakeSigningKey);
         spyOn(jwt, 'verify').and.callFake(() => fakeClaim);
         const user = new Parse.User();
         user

spec/rest.spec.js

@@ -1172,6 +1172,224 @@ describe('read-only masterKey', () => {
         done();
       });
   });
+
+  it('should throw when trying to create a hook function', async () => {
+    loggerErrorSpy.calls.reset();
+    try {
+      await request({
+        url: `${Parse.serverURL}/hooks/functions`,
+        method: 'POST',
+        headers: {
+          'X-Parse-Application-Id': Parse.applicationId,
+          'X-Parse-Master-Key': 'read-only-test',
+          'Content-Type': 'application/json',
+        },
+        body: { functionName: 'readOnlyTest', url: 'https://example.com/hook' },
+      });
+      fail('should have thrown');
+    } catch (res) {
+      expect(res.data.code).toBe(Parse.Error.OPERATION_FORBIDDEN);
+      expect(res.data.error).toBe('Permission denied');
+    }
+  });
+
+  it('should throw when trying to create a hook trigger', async () => {
+    loggerErrorSpy.calls.reset();
+    try {
+      await request({
+        url: `${Parse.serverURL}/hooks/triggers`,
+        method: 'POST',
+        headers: {
+          'X-Parse-Application-Id': Parse.applicationId,
+          'X-Parse-Master-Key': 'read-only-test',
+          'Content-Type': 'application/json',
+        },
+        body: { className: 'MyClass', triggerName: 'beforeSave', url: 'https://example.com/hook' },
+      });
+      fail('should have thrown');
+    } catch (res) {
+      expect(res.data.code).toBe(Parse.Error.OPERATION_FORBIDDEN);
+      expect(res.data.error).toBe('Permission denied');
+    }
+  });
+
+  it('should throw when trying to update a hook function', async () => {
+    // First create the hook with the real master key
+    await request({
+      url: `${Parse.serverURL}/hooks/functions`,
+      method: 'POST',
+      headers: {
+        'X-Parse-Application-Id': Parse.applicationId,
+        'X-Parse-Master-Key': Parse.masterKey,
+        'Content-Type': 'application/json',
+      },
+      body: { functionName: 'readOnlyUpdateTest', url: 'https://example.com/hook' },
+    });
+    loggerErrorSpy.calls.reset();
+    try {
+      await request({
+        url: `${Parse.serverURL}/hooks/functions/readOnlyUpdateTest`,
+        method: 'PUT',
+        headers: {
+          'X-Parse-Application-Id': Parse.applicationId,
+          'X-Parse-Master-Key': 'read-only-test',
+          'Content-Type': 'application/json',
+        },
+        body: { url: 'https://example.com/hacked' },
+      });
+      fail('should have thrown');
+    } catch (res) {
+      expect(res.data.code).toBe(Parse.Error.OPERATION_FORBIDDEN);
+      expect(res.data.error).toBe('Permission denied');
+    }
+  });
+
+  it('should throw when trying to delete a hook function', async () => {
+    // First create the hook with the real master key
+    await request({
+      url: `${Parse.serverURL}/hooks/functions`,
+      method: 'POST',
+      headers: {
+        'X-Parse-Application-Id': Parse.applicationId,
+        'X-Parse-Master-Key': Parse.masterKey,
+        'Content-Type': 'application/json',
+      },
+      body: { functionName: 'readOnlyDeleteTest', url: 'https://example.com/hook' },
+    });
+    loggerErrorSpy.calls.reset();
+    try {
+      await request({
+        url: `${Parse.serverURL}/hooks/functions/readOnlyDeleteTest`,
+        method: 'PUT',
+        headers: {
+          'X-Parse-Application-Id': Parse.applicationId,
+          'X-Parse-Master-Key': 'read-only-test',
+          'Content-Type': 'application/json',
+        },
+        body: { __op: 'Delete' },
+      });
+      fail('should have thrown');
+    } catch (res) {
+      expect(res.data.code).toBe(Parse.Error.OPERATION_FORBIDDEN);
+      expect(res.data.error).toBe('Permission denied');
+    }
+  });
+
+  it('should throw when trying to run a job with readOnlyMasterKey', async () => {
+    Parse.Cloud.job('readOnlyTestJob', () => {});
+    loggerErrorSpy.calls.reset();
+    try {
+      await request({
+        url: `${Parse.serverURL}/jobs/readOnlyTestJob`,
+        method: 'POST',
+        headers: {
+          'X-Parse-Application-Id': Parse.applicationId,
+          'X-Parse-Master-Key': 'read-only-test',
+          'Content-Type': 'application/json',
+        },
+        body: {},
+      });
+      fail('should have thrown');
+    } catch (res) {
+      expect(res.data.code).toBe(Parse.Error.OPERATION_FORBIDDEN);
+      expect(res.data.error).toBe('Permission denied');
+    }
+  });
+
+  it('should allow reading hooks with readOnlyMasterKey', async () => {
+    const res = await request({
+      url: `${Parse.serverURL}/hooks/functions`,
+      method: 'GET',
+      headers: {
+        'X-Parse-Application-Id': Parse.applicationId,
+        'X-Parse-Master-Key': 'read-only-test',
+      },
+    });
+    expect(Array.isArray(res.data)).toBe(true);
+  });
+
+  it('should throw when trying to delete a file with readOnlyMasterKey', async () => {
+    // Create a file with the real master key
+    const uploadRes = await request({
+      method: 'POST',
+      url: `${Parse.serverURL}/files/readonly-delete-test.txt`,
+      headers: {
+        'X-Parse-Application-Id': Parse.applicationId,
+        'X-Parse-Master-Key': Parse.masterKey,
+        'Content-Type': 'text/plain',
+      },
+      body: 'file content',
+    });
+    const filename = uploadRes.data.name;
+    expect(filename).toBeDefined();
+
+    // Attempt delete with readOnlyMasterKey — should be rejected
+    loggerErrorSpy.calls.reset();
+    try {
+      await request({
+        method: 'DELETE',
+        url: `${Parse.serverURL}/files/${filename}`,
+        headers: {
+          'X-Parse-Application-Id': Parse.applicationId,
+          'X-Parse-Master-Key': 'read-only-test',
+        },
+      });
+      fail('should have thrown');
+    } catch (res) {
+      expect(res.status).toBe(403);
+      expect(res.data.error).toBe('Permission denied');
+    }
+
+    // Verify file still exists
+    const getRes = await request({ url: uploadRes.data.url });
+    expect(getRes.status).toBe(200);
+  });
+
+  it('should throw when trying to create a file with readOnlyMasterKey', async () => {
+    loggerErrorSpy.calls.reset();
+    try {
+      await request({
+        method: 'POST',
+        url: `${Parse.serverURL}/files/readonly-create-test.txt`,
+        headers: {
+          'X-Parse-Application-Id': Parse.applicationId,
+          'X-Parse-Master-Key': 'read-only-test',
+          'Content-Type': 'text/plain',
+        },
+        body: 'file content',
+      });
+      fail('should have thrown');
+    } catch (res) {
+      expect(res.status).toBe(403);
+      expect(res.data.error).toBe('Permission denied');
+    }
+  });
+
+  it('should throw when trying to loginAs with readOnlyMasterKey', async () => {
+    // Create a target user
+    await Parse.User.signUp('readonly-loginas-test', 'password123');
+    const userId = Parse.User.current().id;
+    await Parse.User.logOut();
+
+    // Attempt loginAs with readOnlyMasterKey — should be rejected
+    loggerErrorSpy.calls.reset();
+    try {
+      await request({
+        method: 'POST',
+        url: `${Parse.serverURL}/loginAs`,
+        headers: {
+          'X-Parse-Application-Id': Parse.applicationId,
+          'X-Parse-Master-Key': 'read-only-test',
+          'Content-Type': 'application/json',
+        },
+        body: { userId },
+      });
+      fail('should have thrown');
+    } catch (res) {
+      expect(res.data.code).toBe(Parse.Error.OPERATION_FORBIDDEN);
+      expect(res.data.error).toBe('Permission denied');
+    }
+  });
 });
 
 describe('rest context', () => {

spec/vulnerabilities.spec.js

@@ -478,6 +478,75 @@ describe('Vulnerabilities', () => {
   });
 });
 
+describe('Malformed $regex information disclosure', () => {
+  it('should not leak database error internals for invalid regex pattern in class query', async () => {
+    const logger = require('../lib/logger').default;
+    const loggerErrorSpy = spyOn(logger, 'error').and.callThrough();
+    const obj = new Parse.Object('TestObject');
+    await obj.save({ field: 'value' });
+
+    try {
+      await request({
+        method: 'GET',
+        url: `http://localhost:8378/1/classes/TestObject`,
+        headers: {
+          'Content-Type': 'application/json',
+          'X-Parse-Application-Id': 'test',
+          'X-Parse-REST-API-Key': 'rest',
+        },
+        qs: {
+          where: JSON.stringify({ field: { $regex: '[abc' } }),
+        },
+      });
+      fail('Request should have failed');
+    } catch (e) {
+      expect(e.data.code).toBe(Parse.Error.INTERNAL_SERVER_ERROR);
+      expect(e.data.error).toBe('An internal server error occurred');
+      expect(typeof e.data.error).toBe('string');
+      expect(JSON.stringify(e.data)).not.toContain('errmsg');
+      expect(JSON.stringify(e.data)).not.toContain('codeName');
+      expect(JSON.stringify(e.data)).not.toContain('errorResponse');
+      expect(loggerErrorSpy).toHaveBeenCalledWith(
+        'Sanitized error:',
+        jasmine.stringMatching(/[Rr]egular expression/i)
+      );
+    }
+  });
+
+  it('should not leak database error internals for invalid regex pattern in role query', async () => {
+    const logger = require('../lib/logger').default;
+    const loggerErrorSpy = spyOn(logger, 'error').and.callThrough();
+    const role = new Parse.Role('testrole', new Parse.ACL());
+    await role.save(null, { useMasterKey: true });
+    try {
+      await request({
+        method: 'GET',
+        url: `http://localhost:8378/1/roles`,
+        headers: {
+          'Content-Type': 'application/json',
+          'X-Parse-Application-Id': 'test',
+          'X-Parse-REST-API-Key': 'rest',
+        },
+        qs: {
+          where: JSON.stringify({ name: { $regex: '[abc' } }),
+        },
+      });
+      fail('Request should have failed');
+    } catch (e) {
+      expect(e.data.code).toBe(Parse.Error.INTERNAL_SERVER_ERROR);
+      expect(e.data.error).toBe('An internal server error occurred');
+      expect(typeof e.data.error).toBe('string');
+      expect(JSON.stringify(e.data)).not.toContain('errmsg');
+      expect(JSON.stringify(e.data)).not.toContain('codeName');
+      expect(JSON.stringify(e.data)).not.toContain('errorResponse');
+      expect(loggerErrorSpy).toHaveBeenCalledWith(
+        'Sanitized error:',
+        jasmine.stringMatching(/[Rr]egular expression/i)
+      );
+    }
+  });
+});
+
 describe('Postgres regex sanitizater', () => {
   it('sanitizes the regex correctly to prevent Injection', async () => {
     const user = new Parse.User();

src/Adapters/Auth/apple.js

@@ -77,7 +77,7 @@ const verifyIdToken = async ({ token, id }, { clientId, cacheMaxEntries, cacheMa
     throw new Parse.Error(Parse.Error.OBJECT_NOT_FOUND, `id token is invalid for this user.`);
   }
 
-  const { kid: keyId, alg: algorithm } = authUtils.getHeaderFromToken(token);
+  const { kid: keyId } = authUtils.getHeaderFromToken(token);
   const ONE_HOUR_IN_MS = 3600000;
   let jwtClaims;
 
@@ -89,7 +89,7 @@ const verifyIdToken = async ({ token, id }, { clientId, cacheMaxEntries, cacheMa
 
   try {
     jwtClaims = jwt.verify(token, signingKey, {
-      algorithms: algorithm,
+      algorithms: ['RS256'],
       // the audience can be checked against a string, a regular expression or a list of strings and/or regular expressions.
       audience: clientId,
     });

src/Adapters/Auth/facebook.js

@@ -136,7 +136,7 @@ const verifyIdToken = async ({ token, id }, { clientId, cacheMaxEntries, cacheMa
     throw new Parse.Error(Parse.Error.OBJECT_NOT_FOUND, 'id token is invalid for this user.');
   }
 
-  const { kid: keyId, alg: algorithm } = authUtils.getHeaderFromToken(token);
+  const { kid: keyId } = authUtils.getHeaderFromToken(token);
   const ONE_HOUR_IN_MS = 3600000;
   let jwtClaims;
 
@@ -148,7 +148,7 @@ const verifyIdToken = async ({ token, id }, { clientId, cacheMaxEntries, cacheMa
 
   try {
     jwtClaims = jwt.verify(token, signingKey, {
-      algorithms: algorithm,
+      algorithms: ['RS256'],
       // the audience can be checked against a string, a regular expression or a list of strings and/or regular expressions.
       audience: clientId,
     });

src/Adapters/Auth/google.js

@@ -4,6 +4,8 @@
  * @class GoogleAdapter
  * @param {Object} options - The adapter configuration options.
  * @param {string} options.clientId - Your Google application Client ID. Required for authentication.
+ * @param {number} [options.cacheMaxEntries] - Maximum number of JWKS cache entries. Default: 5.
+ * @param {number} [options.cacheMaxAge] - Maximum age of JWKS cache entries in ms. Default: 3600000 (1 hour).
  *
  * @description
  * ## Parse Server Configuration
@@ -21,7 +23,6 @@
  * The adapter requires the following `authData` fields:
  * - **id**: The Google user ID.
  * - **id_token**: The Google ID token.
- * - **access_token**: The Google access token.
  *
  * ## Auth Payload
  * ### Example Auth Data Payload
@@ -29,85 +30,67 @@
  * {
  *   "google": {
  *     "id": "1234567",
- *     "id_token": "xxxxx.yyyyy.zzzzz",
- *     "access_token": "abc123def456ghi789"
+ *     "id_token": "xxxxx.yyyyy.zzzzz"
  *   }
  * }
  * ```
  *
  * ## Notes
  * - Ensure your Google Client ID is configured properly in the Parse Server configuration.
- * - The `id_token` and `access_token` are validated against Google's authentication services.
+ * - The `id_token` is validated against Google's authentication services.
  *
  * @see {@link https://developers.google.com/identity/sign-in/web/backend-auth Google Authentication Documentation}
  */
 
 'use strict';
 
-// Helper functions for accessing the google API.
 var Parse = require('parse/node').Parse;
 
-const https = require('https');
+const jwksClient = require('jwks-rsa');
 const jwt = require('jsonwebtoken');
 const authUtils = require('./utils');
 
 const TOKEN_ISSUER = 'accounts.google.com';
 const HTTPS_TOKEN_ISSUER = 'https://accounts.google.com';
 
-let cache = {};
-
-// Retrieve Google Signin Keys (with cache control)
-function getGoogleKeyByKeyId(keyId) {
-  if (cache[keyId] && cache.expiresAt > new Date()) {
-    return cache[keyId];
-  }
-
-  return new Promise((resolve, reject) => {
-    https
-      .get(`https://www.googleapis.com/oauth2/v3/certs`, res => {
-        let data = '';
-        res.on('data', chunk => {
-          data += chunk.toString('utf8');
-        });
-        res.on('end', () => {
-          const { keys } = JSON.parse(data);
-          const pems = keys.reduce(
-            (pems, { n: modulus, e: exposant, kid }) =>
-              Object.assign(pems, {
-                [kid]: rsaPublicKeyToPEM(modulus, exposant),
-              }),
-            {}
-          );
-
-          if (res.headers['cache-control']) {
-            var expire = res.headers['cache-control'].match(/max-age=([0-9]+)/);
-
-            if (expire) {
-              cache = Object.assign({}, pems, {
-                expiresAt: new Date(new Date().getTime() + Number(expire[1]) * 1000),
-              });
-            }
-          }
-
-          resolve(pems[keyId]);
-        });
-      })
-      .on('error', reject);
+const getGoogleKeyByKeyId = async (keyId, cacheMaxEntries, cacheMaxAge) => {
+  const client = jwksClient({
+    jwksUri: 'https://www.googleapis.com/oauth2/v3/certs',
+    cache: true,
+    cacheMaxEntries,
+    cacheMaxAge,
   });
-}
 
-async function verifyIdToken({ id_token: token, id }, { clientId }) {
+  let key;
+  try {
+    key = await authUtils.getSigningKey(client, keyId);
+  } catch {
+    throw new Parse.Error(
+      Parse.Error.OBJECT_NOT_FOUND,
+      `Unable to find matching key for Key ID: ${keyId}`
+    );
+  }
+  return key;
+};
+
+async function verifyIdToken({ id_token: token, id }, { clientId, cacheMaxEntries, cacheMaxAge }) {
   if (!token) {
     throw new Parse.Error(Parse.Error.OBJECT_NOT_FOUND, `id token is invalid for this user.`);
   }
 
-  const { kid: keyId, alg: algorithm } = authUtils.getHeaderFromToken(token);
+  const { kid: keyId } = authUtils.getHeaderFromToken(token);
+  const ONE_HOUR_IN_MS = 3600000;
   let jwtClaims;
-  const googleKey = await getGoogleKeyByKeyId(keyId);
+
+  cacheMaxAge = cacheMaxAge || ONE_HOUR_IN_MS;
+  cacheMaxEntries = cacheMaxEntries || 5;
+
+  const googleKey = await getGoogleKeyByKeyId(keyId, cacheMaxEntries, cacheMaxAge);
+  const signingKey = googleKey.publicKey || googleKey.rsaPublicKey;
 
   try {
-    jwtClaims = jwt.verify(token, googleKey, {
-      algorithms: algorithm,
+    jwtClaims = jwt.verify(token, signingKey, {
+      algorithms: ['RS256'],
       audience: clientId,
     });
   } catch (exception) {
@@ -150,57 +133,3 @@ module.exports = {
   validateAppId: validateAppId,
   validateAuthData: validateAuthData,
 };
-
-// Helpers functions to convert the RSA certs to PEM (from jwks-rsa)
-function rsaPublicKeyToPEM(modulusB64, exponentB64) {
-  const modulus = new Buffer(modulusB64, 'base64');
-  const exponent = new Buffer(exponentB64, 'base64');
-  const modulusHex = prepadSigned(modulus.toString('hex'));
-  const exponentHex = prepadSigned(exponent.toString('hex'));
-  const modlen = modulusHex.length / 2;
-  const explen = exponentHex.length / 2;
-
-  const encodedModlen = encodeLengthHex(modlen);
-  const encodedExplen = encodeLengthHex(explen);
-  const encodedPubkey =
-    '30' +
-    encodeLengthHex(modlen + explen + encodedModlen.length / 2 + encodedExplen.length / 2 + 2) +
-    '02' +
-    encodedModlen +
-    modulusHex +
-    '02' +
-    encodedExplen +
-    exponentHex;
-
-  const der = new Buffer(encodedPubkey, 'hex').toString('base64');
-
-  let pem = '-----BEGIN RSA PUBLIC KEY-----\n';
-  pem += `${der.match(/.{1,64}/g).join('\n')}`;
-  pem += '\n-----END RSA PUBLIC KEY-----\n';
-  return pem;
-}
-
-function prepadSigned(hexStr) {
-  const msb = hexStr[0];
-  if (msb < '0' || msb > '7') {
-    return `00${hexStr}`;
-  }
-  return hexStr;
-}
-
-function toHex(number) {
-  const nstr = number.toString(16);
-  if (nstr.length % 2) {
-    return `0${nstr}`;
-  }
-  return nstr;
-}
-
-function encodeLengthHex(n) {
-  if (n <= 127) {
-    return toHex(n);
-  }
-  const nHex = toHex(n);
-  const lengthOfLengthByte = 128 + nHex.length / 2;
-  return toHex(lengthOfLengthByte) + nHex;
-}

src/Adapters/Auth/instagram.js

@@ -96,8 +96,7 @@ class InstagramAdapter extends BaseAuthCodeAdapter {
   }
 
   async getUserFromAccessToken(accessToken, authData) {
-    const defaultURL = 'https://graph.instagram.com/';
-    const apiURL = authData.apiURL || defaultURL;
+    const apiURL = 'https://graph.instagram.com/';
     const path = `${apiURL}me?fields=id&access_token=${accessToken}`;
 
     const response = await fetch(path);

src/Controllers/DatabaseController.js

@@ -20,6 +20,7 @@ import SchemaCache from '../Adapters/Cache/SchemaCache';
 import type { LoadSchemaOptions } from './types';
 import type { ParseServerOptions } from '../Options';
 import type { QueryOptions, FullQueryOptions } from '../Adapters/Storage/StorageAdapter';
+import { createSanitizedError } from '../Error';
 
 function addWriteACL(query, acl) {
   const newQuery = _.cloneDeep(query);
@@ -1354,7 +1355,19 @@ class DatabaseController {
                     })
                   )
                   .catch(error => {
-                    throw new Parse.Error(Parse.Error.INTERNAL_SERVER_ERROR, error);
+                    if (error instanceof Parse.Error) {
+                      throw error;
+                    }
+                    const detailedMessage =
+                      typeof error === 'string'
+                        ? error
+                        : error?.message || 'An internal server error occurred';
+                    throw createSanitizedError(
+                      Parse.Error.INTERNAL_SERVER_ERROR,
+                      detailedMessage,
+                      this.options,
+                      'An internal server error occurred'
+                    );
                   });
               }
             });

src/Error.js

@@ -6,9 +6,11 @@ import defaultLogger from './logger';
  *
  * @param {number} errorCode - The Parse.Error code (e.g., Parse.Error.OPERATION_FORBIDDEN)
  * @param {string} detailedMessage - The detailed error message to log server-side
+ * @param {object} config - Parse Server config with enableSanitizedErrorResponse
+ * @param {string} [sanitizedMessage='Permission denied'] - The sanitized message to return to clients
  * @returns {Parse.Error} A Parse.Error with sanitized message
  */
-function createSanitizedError(errorCode, detailedMessage, config) {
+function createSanitizedError(errorCode, detailedMessage, config, sanitizedMessage = 'Permission denied') {
   // On testing we need to add a prefix to the message to allow to find the correct call in the TestUtils.js file
   if (process.env.TESTING) {
     defaultLogger.error('Sanitized error:', detailedMessage);
@@ -16,7 +18,7 @@ function createSanitizedError(errorCode, detailedMessage, config) {
     defaultLogger.error(detailedMessage);
   }
 
-  return new Parse.Error(errorCode, config?.enableSanitizedErrorResponse !== false ? 'Permission denied' : detailedMessage);
+  return new Parse.Error(errorCode, config?.enableSanitizedErrorResponse !== false ? sanitizedMessage : detailedMessage);
 }
 
 /**

src/Routers/FilesRouter.js

@@ -5,6 +5,7 @@ import Config from '../Config';
 import logger from '../logger';
 const triggers = require('../triggers');
 const Utils = require('../Utils');
+import { createSanitizedHttpError } from '../Error';
 
 export class FilesRouter {
   expressRouter({ maxUploadSize = '20Mb' } = {}) {
@@ -112,6 +113,12 @@ export class FilesRouter {
   }
 
   async createHandler(req, res, next) {
+    if (req.auth.isReadOnly) {
+      const error = createSanitizedHttpError(403, "read-only masterKey isn't allowed to create a file.", req.config);
+      res.status(error.status);
+      res.end(`{"error":"${error.message}"}`);
+      return;
+    }
     const config = req.config;
     const user = req.auth.user;
     const isMaster = req.auth.isMaster;
@@ -266,6 +273,12 @@ export class FilesRouter {
   }
 
   async deleteHandler(req, res, next) {
+    if (req.auth.isReadOnly) {
+      const error = createSanitizedHttpError(403, "read-only masterKey isn't allowed to delete a file.", req.config);
+      res.status(error.status);
+      res.end(`{"error":"${error.message}"}`);
+      return;
+    }
     try {
       const { filesController } = req.config;
       const { filename } = req.params;

src/Routers/FunctionsRouter.js

@@ -8,6 +8,7 @@ import { promiseEnforceMasterKeyAccess, promiseEnsureIdempotency } from '../midd
 import { jobStatusHandler } from '../StatusHandler';
 import _ from 'lodash';
 import { logger } from '../logger';
+import { createSanitizedError } from '../Error';
 
 function parseObject(obj, config) {
   if (Array.isArray(obj)) {
@@ -58,6 +59,13 @@ export class FunctionsRouter extends PromiseRouter {
   }
 
   static handleCloudJob(req) {
+    if (req.auth.isReadOnly) {
+      throw createSanitizedError(
+        Parse.Error.OPERATION_FORBIDDEN,
+        "read-only masterKey isn't allowed to run a job.",
+        req.config
+      );
+    }
     const jobName = req.params.jobName || req.body?.jobName;
     const applicationId = req.config.applicationId;
     const jobHandler = jobStatusHandler(req.config);

src/Routers/HooksRouter.js

@@ -1,6 +1,7 @@
 import { Parse } from 'parse/node';
 import PromiseRouter from '../PromiseRouter';
 import * as middleware from '../middlewares';
+import { createSanitizedError } from '../Error';
 
 export class HooksRouter extends PromiseRouter {
   createHook(aHook, config) {
@@ -12,6 +13,13 @@ export class HooksRouter extends PromiseRouter {
   }
 
   handlePost(req) {
+    if (req.auth.isReadOnly) {
+      throw createSanitizedError(
+        Parse.Error.OPERATION_FORBIDDEN,
+        "read-only masterKey isn't allowed to create a hook.",
+        req.config
+      );
+    }
     return this.createHook(req.body || {}, req.config);
   }
 
@@ -82,6 +90,13 @@ export class HooksRouter extends PromiseRouter {
   }
 
   handlePut(req) {
+    if (req.auth.isReadOnly) {
+      throw createSanitizedError(
+        Parse.Error.OPERATION_FORBIDDEN,
+        "read-only masterKey isn't allowed to modify a hook.",
+        req.config
+      );
+    }
     var body = req.body || {};
     if (body.__op == 'Delete') {
       return this.handleDelete(req);

src/Routers/UsersRouter.js

@@ -341,6 +341,13 @@ export class UsersRouter extends ClassesRouter {
         req.config
       );
     }
+    if (req.auth.isReadOnly) {
+      throw createSanitizedError(
+        Parse.Error.OPERATION_FORBIDDEN,
+        "read-only masterKey isn't allowed to login as another user.",
+        req.config
+      );
+    }
 
     const userId = req.body?.userId || req.query.userId;
     if (!userId) {