Weakness (CWE)
CWE-639: Authorization Bypass Through User-Controlled Key
The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.
More detail
It is likely that an attacker would have to be an authenticated user in the system. However, the authorization process would not properly check the data access operation to ensure that the authenticated user performing the operation has sufficient entitlements to perform the requested data access, hence bypassing any other authorization checks present in the system.
For example, attackers can look at places where user specific data is retrieved (e.g. search screens) and determine whether the key for the item being looked up is controllable externally. The key may be a hidden field in the HTML form field, might be passed as a URL parameter or as an unencrypted cookie variable, then in each of these cases it will be possible to tamper with the key value.
How to prevent it (3 mitigations)
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Architecture and Design
For each and every data access, ensure that the user has sufficient privilege to access the record that is being requested.
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Architecture and Design, Implementation
Make sure that the key that is used in the lookup of a specific user's record is not controllable externally by the user or that any tampering can be detected.
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Architecture and Design
Use encryption in order to make it more difficult to guess other legitimate values of the key or associate a digital signature with the key so that the server can verify that there has been no tampering.
Source: MITRE CWE-639
1,015 results · Clear filters · Feed
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High 8.1
SuiteCRM has a REST API V8 IDOR: Missing ACL Checks on User Preferences and Relationship Endpoints
SuiteCRM is an open-source, enterprise-ready Customer Relationship Management (CRM) software application. Prior to versions 7.15.1 and 8.9.3, the SuiteCRM REST API V8 has missing ACL (Access Control List) checks on several endpoints, allowing authenticated us…
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High 8.1
Outline's IDOR allows unauthorized viewing and seizing of private deleted drafts
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High 7.7
Authentication Bypass in extension "E-Mail MFA Provider" (mfa_email)
The extension fails to properly reset the generated MFA code after successful authentication. This leads to a possible MFA bypass for future login attempts by providing an empty string as MFA code to the extensions MFA provider.
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High 8.6
Identity based authorization bypass vulnerability (IDOR) in the Wakyma application web
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High 7.8
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High 7.5
NEX-Forms – Ultimate Forms Plugin for WordPress <= 9.1.9 - Missing Authorization to Unauthenticated Arbitrary Form Entry Modification via nf_set_entry_update_id
The NEX-Forms – Ultimate Forms Plugin for WordPress plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 9.1.9 via the submit_nex_form() function due to missing validation on a user controlled key. This …
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High 8.8
Broken access control vulnerability affecting ID Server
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High 7.7
ZITADEL Cross-Tenant Information Disclosure in Management API
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High 8.6
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High 8.8
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High 8.1
ProfilePress <= 4.16.11 - Insecure Direct Object Reference to Authenticated (Subscriber+) Arbitrary Subscription Cancellation/Expiration
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High 8.1
An issue in ClasroomIO before v.0.2.6 allows a remote attacker to escalate privileges via the endpoints /api/verify and…
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High 7.1
Sylius affected by IDOR in Cart and Checkout LiveComponents
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High 7.6
Coral Server has insufficient agent authentication in session communication channels
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High 7.1CVE-2026-30945 Public exploit
StudioCMS: IDOR — Arbitrary API Token Revocation Leading to Denial of Service
StudioCMS is a server-side-rendered, Astro native, headless content management system. Prior to 0.4.0, the DELETE /studiocms_api/dashboard/api-tokens endpoint allows any authenticated user with editor privileges or above to revoke API tokens belonging to any …
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High 8.8CVE-2026-30944 Public exploit
StudioCMS Affected by Privilege Escalation via Insecure API Token Generation
StudioCMS is a server-side-rendered, Astro native, headless content management system. Prior to 0.4.0, the /studiocms_api/dashboard/api-tokens endpoint allows any authenticated user (at least Editor) to generate API tokens for any other user, including owner …
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High 8.6
OneUptime has broken access control in GitHub App installation flow that allows unauthorized project binding
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High 7.5
FreshRSS has an IDOR which allows for viewing feeds of any user and leaking tokens
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High 8.8
Flowise: IDOR leading to Account Takeover and Enterprise Feature Bypass via SSO Configuration
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High 8.2
Flare: Password‑Protected Thumbnail Bypass
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High 7.5
OpenClaw < 2026.2.14 - Cross-Account Policy Context Misrouting via Shared Webhook Path Ambiguity
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High 8.4
Cache poisoning via insecure-by-default cache key
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High 7.1
Craft Affected by Entries Authorship Spoofing via Mass Assignment
Craft is a content management system (CMS). Prior to 4.17.0-beta.1 and 5.9.0-beta.1, the entry creation process allows for Mass Assignment of the authorId attribute. A user with "Create Entries" permission can inject the authorIds[] (or authorId) parameter in…
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High 8.7
Craft affected by IDOR via GraphQL @parseRefs
Craft is a content management system (CMS). Prior to 4.17.0-beta.1 and 5.9.0-beta.1, the GraphQL directive @parseRefs, intended to parse internal reference tags (e.g., {user:1:email}), can be abused by both authenticated users and unauthenticated guests (if a…
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High —
OpenClaw's commands.allowFrom sender authorization accepted conversation identifiers via ctx.From
### Summary `commands.allowFrom` is documented as a sender authorization allowlist for commands/directives, but command authorization could include `ctx.From` (conversation identity) as a sender candidate. When `commands.allowFrom` contained conversation-like…
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High 8.4
In parsePermissionGroup of ParsedPermissionUtils.java, there is a possible way to bypass a consent dialog to obtain per…
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High 7.1
Insecure Direct Object Reference Message ID
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High 7.1
OpenEMR's Portal Payment Endpoint Trusts User-Controlled pid
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High 8.3
hoppscotch has IDOR in updateUserEnvironment / deleteUserEnvironment
hoppscotch is an open source API development ecosystem. Prior to version 2026.2.0, any logged-in user can read, modify or delete another user's personal environment by ID. `user-environments.resolver.ts:82-109`, `updateUserEnvironment` mutation uses `@UseGuar…
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High 7.5
Umbraco.Engage.Forms Allows Unauthorized Access to Multiple API Endpoints
Umbraco Engage is a business intelligence platform. A vulnerability has been identified in Umbraco Engage prior to versions 16.2.1 and 17.1.1 where certain API endpoints are exposed without enforcing authentication or authorization checks. The affected endpoi…
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High 7.5
Discourse has authentication bypass vulnerability in the Patreon plugin webhook endpoint
Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, when the `patreon_webhook_secret` site setting is blank, an attacker can forge valid webhook signatures by computing an HMAC-MD5 with an empty string as the …
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High 7.1
OpenEMR Missing Authorization Checks in DICOM Viewer State API
OpenEMR is a free and open source electronic health records and medical practice management application. Prior to version 8.0.0, the DICOM viewer state API (e.g. upload or state save/load) accepts a document ID (`doc_id`) without verifying that the document b…
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High 7.5
WordPress Authorsy plugin <= 1.0.6 - Insecure Direct Object References (IDOR) vulnerability
Authorization Bypass Through User-Controlled Key vulnerability in themeplugs Authorsy authorsy allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Authorsy: from n/a through <= 1.0.6.
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High 7.5
WordPress PawFriends - Pet Shop and Veterinary WordPress theme theme <= 1.3 - Insecure Direct Object References (IDOR) vulnerability
Authorization Bypass Through User-Controlled Key vulnerability in Mikado-Themes PawFriends - Pet Shop and Veterinary WordPress Theme pawfriends allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects PawFriends - Pet Shop an…
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High 7.5
WordPress Cnvrse plugin < 026.02.10.20 - Insecure Direct Object References (IDOR) vulnerability
Authorization Bypass Through User-Controlled Key vulnerability in cnvrse Cnvrse cnvrse allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Cnvrse: from n/a through < 026.02.10.20.
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High 7.5
WordPress Shiprocket plugin <= 2.0.8 - Insecure Direct Object References (IDOR) vulnerability
Authorization Bypass Through User-Controlled Key vulnerability in Shiprocket Shiprocket shiprocket allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Shiprocket: from n/a through <= 2.0.8.
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High 7.3
IDOR in MeCODE Informatics' Envanty
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High 7.1
Improper Access Control (IDOR) vulnerability in Graylog Web Interface
Improper Access Control (IDOR) in the Graylog API, version 2.2.3, which occurs when modifying the user ID in the URL. An authenticated user can access other user's profiles without proper authorization checks. Exploiting this vulnerability allows valid users …
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High 7.1
OpenClaw Hook Session Key Override Enables Targeted Cross-Session Routing
## Summary The issue is not deterministic session keys by itself. The exploitable path was accepting externally supplied `sessionKey` values on authenticated hook ingress, allowing a hook token holder to route messages into chosen sessions. ## Affected Behavi…
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High 8.3
IDOR in Universal Sotware's FlexCity/Kiosk
Authorization Bypass Through User-Controlled Key vulnerability in Universal Software Inc. FlexCity/Kiosk allows Exploitation of Trusted Identifiers. This issue affects FlexCity/Kiosk: from 1.0 before 1.0.36.