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
3,334 results · Feed
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High 8.8
Broken Access Control in ABB T-MAC Plus web application
Authorization bypass through User-Controlled key vulnerability in ABB T-MAC Plus. This issue affects T-MAC Plus: 4.0-24.
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High 8.8
CWE-639: Authorization Bypass Through User-Controlled Key in web services in Progress Sitefinity
CWE-639: Authorization Bypass Through User-Controlled Key in web services in Progress Sitefinity 15.2.x before 15.2.8441, 15.3.x before 15.3.8531, and 15.4.x before 15.4.8630 allows a remote authenticated attacker to modify account properties of other users, …
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Low 3.7
Kiteworks Secure Data Forms is vulnerable to Authorization Bypass Through User-Controlled Key
Kiteworks is a private data network (PDN). Prior to version 9.3.0, an Insecure Direct Object Reference (IDOR) vulnerability in Kiteworks Secure Data Forms allows an authenticated user to access metadata of resources belonging to other users due to insufficien…
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Medium 4.3
Kiteworks Secure Data Forms is vulnerable to Authorization Bypass Through User-Controlled Key
Kiteworks is a private data network (PDN). Prior to version 9.3.0, an Insecure Direct Object Reference (IDOR) vulnerability in Kiteworks Secure Data Forms allows an authenticated user to modify resources belonging to other users due to insufficient authorizat…
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Medium 5.4
Kiteworks Secure Data Forms is vulnerable to Authorization Bypass Through User-Controlled Key
Kiteworks is a private data network (PDN). Prior to version 9.3.0, an Insecure Direct Object Reference (IDOR) vulnerability in Kiteworks Secure Data Forms allows an authenticated user to modify permissions on resources belonging to other users due to insuffic…
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Medium 6.5
Kiteworks Secure Data Forms is vulnerable to Authorization Bypass Through User-Controlled Key
Kiteworks is a private data network (PDN). Prior to version 9.3.0, an Insecure Direct Object Reference (IDOR) vulnerability in Kiteworks Secure Data Forms allows an authenticated user to modify resources belonging to other users due to insufficient authorizat…
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Medium 6.5
Kiteworks Secure Data Forms is vulnerable to Authorization Bypass Through User-Controlled Key
Kiteworks is a private data network (PDN). Prior to version 9.3.0, an Insecure Direct Object Reference (IDOR) vulnerability in Kiteworks Secure Data Forms allows an authenticated attacker to tamper with the internal approval flow configurations of forms belon…
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Medium 6.8
Nextcloud: Propfind requests for file comments allowed to load comments for other files
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High 8.1
Nextcloud: Cross-Account Calendar Takeover via Unauthorized Group-Member-Set Update
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Low 3.5
Nextcloud: Files drop share links for end-to-end encrypted folders allowed to drop files into other folders of the share owner
Nextcloud is an open source content collaboration platform. From versions 1.15.0 to before 1.15.4, 1.16.0 to before 1.16.3, 1.17.0 to before 1.17.1, and 1.18.0 to before 1.18.1, a malicious user with access to an end-to-end encrypted files drop link was able …
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Low 2.6
Nextcloud: Private circle can be added to another circle via API
Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.7 and 33.0.0 to before 33.0.1, a missing access check on API level allowed to add unknown circles by their ID directly to other circles. Since …
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High 7.5
Apache Airflow: API authorization bypass: bulk TaskInstances allows cross-DAG mutation
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Medium 4.3
Apache Airflow: Event Log detail endpoint bypasses DAG-scoped event log permission filter
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Medium 6.3
AstrBotDevs AstrBot astr_main_agent.py astr_main_agent authorization
A vulnerability was identified in AstrBotDevs AstrBot 4.24.2. This affects the function astr_main_agent of the file astrbot/core/astr_main_agent.py. Such manipulation of the argument session_id leads to authorization bypass. It is possible to launch the attac…
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Medium 4.3
Dolibarr ERP CRM messaging.php authorization
A vulnerability has been found in Dolibarr ERP CRM 23.0.0/23.0.1/23.0.2. The affected element is an unknown function of the file htdocs/user/messaging.php. Such manipulation of the argument ID leads to authorization bypass. The attack can be executed remotely…
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High 8.7
Formie: Unauthenticated front-end submission editing can overwrite existing submissions
Formie is a Craft CMS plugin for creating forms. Prior to 2.2.21 and 3.1.26, unauthenticated users could modify existing submissions by posting a known or guessed submission ID to formie/submissions/save-submission. This vulnerability is fixed in 2.2.21 and 3…
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Medium 6.5
In JetBrains YouTrack before 2026.1.13570 improper access control allowed enumeration of restricted issues and articles…
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Medium 5.3
Dokploy: Cross-Organization IDOR - Multiple tRPC endpoints missing activeOrganizationId validation
Dokploy is a free, self-hostable Platform as a Service (PaaS). In 0.19.0 and earlier, the protectedProcedure middleware only verifies the user is authenticated - it does NOT enforce organization scoping. Each endpoint must individually verify the resource's o…
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Medium 5.1
Group-Office: Authenticated Stored XSS in Administrator Context via Arbitrary Cross-User Setting Write
Group-Office is an enterprise customer relationship management and groupware tool. Prior to 26.0.25, 25.0.100, and 6.8.165, GroupOffice allows authenticated users to persist arbitrary legacy settings for any user_id via index.php?r=core/saveSetting. A separat…
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Medium 6.5
BankPro E-Service Technology｜Service Center - Insecure Direct Object Reference
Service Center developed by BankPro E-Service Technology has an Insecure Direct Object Reference vulnerability, allowing authenticated remote attackers to modify the parameter of a specific query function to access other users' EC order details.
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Low 2.0
AnythingLLM: Legacy mobile device tokens bypass multi-user workspace scoping after mode migration
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High 7.1
LinkAce: IDOR in Update Policies Allows Any Authenticated User to Overwrite Other Users' Links, Lists, Tags, and Notes
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Medium 5.3
Cross-tenant IDOR on feature-flag and assist-stats routes via {project_id} case mismatch
OpenReplay is a self-hosted session replay suite. Prior to 1.26.0, there is a cross-tenant IDOR on feature-flag and assist-stats routes via {project_id} case mismatch. ProjectAuthorizer.__call__ (OSS api/auth/auth_project.py:14-38 and EE ee/api/auth/auth_proj…
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Medium 6.5
EspoCRM: IDOR in EmailTemplate Prepare Endpoint Leaks Entity Data via Email Address Lookup
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Medium 4.3
EspoCRM: Broken Access Control / IDOR in Note Pinning API allows unauthorized modification of notes
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Medium 5.3
User Registration & Membership <= 5.1.5 - Authenticated (Subscriber+) Insecure Direct Object Reference to Arbitrary Media Deletion via 'profile-pic-url' Parameter
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Medium 6.5
Meta Field Block <= 1.5.1 - Insecure Direct Object Reference to Authenticated (Contributor+) Arbitrary User Meta Exposure
The Meta Field Block plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 1.5.1. This is due to the plugin allowing users to specify arbitrary object IDs and object types via block attributes without val…
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Medium 4.3
FOX – Currency Switcher Professional for WooCommerce <= 1.4.6 - Authenticated (Subscriber+) Authorization Bypass via User-Controlled Key to 'wooc_order_user_roles' Parameter
The FOX – Currency Switcher Professional for WooCommerce plugin for WordPress is vulnerable to Authorization Bypass Through User-Controlled Key in all versions up to and including 1.4.6. This is due to the `get_value()` function in `classes/fixed/fixed_user_r…
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Medium 4.3
Timetable and Event Schedule by MotoPress <= 2.4.16 - Insecure Direct Object Reference to Authenticated (Contributor+) Sensitive Information Exposure via action_get_event_data Function
The Timetable and Event Schedule by MotoPress plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 2.4.16 via the action_get_event_data due to missing validation on a user controlled key. This makes it p…
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Medium 6.0
OpenStack Keystone has an Authorization Bypass
An issue was discovered in OpenStack Keystone before 29.0.2. The Keystone RBAC policy enforcer in enforce_call unconditionally merges the raw JSON request body into the policy enforcement dictionary via policy_dict.update(json_input.copy()), overwriting trust…
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High 8.8
Microsoft UFO WebSocket role spoofing allows authenticated peer task hijacking
Microsoft UFO open-source framework for intelligent automation across devices and platforms. In 3.0.1-4-ge2626659, Microsoft UFO's WebSocket control plane trusts client-supplied identity and role fields in task messages. A client connection can register as a …
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Medium 5.3
Microsoft UFO reuses client-supplied WebSocket session IDs and replays stale task results to new authenticated requesters
Microsoft UFO open-source framework for intelligent automation across devices and platforms. In 3.0.1-4-ge2626659, Microsoft UFO accepts client-supplied session_id values in WebSocket task messages and reuses an existing in-memory session object if that sessi…
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High 8.2
Authorization Bypass Through User-Controlled Key in GitLab
GitLab has remediated an issue in GitLab EE affecting all versions from 18.8 before 18.10.7, 18.11 before 18.11.4, and 19.0 before 19.0.1 that, under certain conditions, could have allowed an authenticated user to cause specific Duo AI workflows to run under …
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Low 3.8
Insecure direct object reference
When creating an export through the pretix API, API clients are returned an UUID value for their export job (a long, random string like 35742818-c375-4d15-839f-d49aecce94d6). Using this UUID, the API client can then request the actual file for download. The s…
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Medium 6.5
WordPress Checkout Files Upload for WooCommerce plugin <= 2.2.5 - Insecure Direct Object References (IDOR) vulnerability
Authorization Bypass Through User-Controlled Key vulnerability in WP Wham Checkout Files Upload for WooCommerce checkout-files-upload-woocommerce allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Checkout Files Upload …
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High 7.5
WordPress BP Better Messages plugin <= 2.14.16 - Insecure Direct Object References (IDOR) vulnerability
Authorization Bypass Through User-Controlled Key vulnerability in wordplus BP Better Messages bp-better-messages allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects BP Better Messages: from n/a through <= 2.14.16.
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High 8.8
Insecure Permissions vulnerability in kvf-admin v1.0.0 allows a remote attacker to escalate privileges via the UserCont…
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High 8.2
code100x Mobile API Authentication Bypass via Header Spoofing
code100x contains an authentication bypass vulnerability in the Mobile API that allows unauthenticated attackers to impersonate arbitrary users by supplying a crafted JSON payload in the 'g' HTTP header. The middleware in middleware.ts skips identity header g…
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Medium 5.9
Kavita: IDOR in /api/Download/*
Kavita is a cross platform reading server. Prior to 0.9.0, the download, size-check, and chapter metadata endpoints do not enforce library-level authorization. A low-privileged user who knows or guesses a chapterId, volumeId, or seriesId belonging to a librar…
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Low 3.1
Bugsink: Issue bulk actions can affect another project’s issue if its UUID is known
Bugsink is a self-hosted error tracking tool. Prior to 2.2.0, In affected versions, the issue list view authorizes access through the project in the URL, but applies the requested bulk action to the submitted issue IDs without also requiring those issues to b…