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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Low 3.1
Bugsink: Issue event views can show an event from another project if its UUID is known
Bugsink is a self-hosted error tracking tool. Prior to 2.2.0, Bugsink issue event pages accept a direct event identifier from the URL and, in affected versions, look up that event without also requiring it to belong to the issue in the URL. This is a project-…
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Medium 6.5
e107: Broken Access Control in e107 comment edit allows cross-user comment modification
e107 is a content management system (CMS). Prior to 2.3.4, a Broken Access Control vulnerability exists in the application, allowing an unauthorized authenticated user to edit comments posted by others. This stems from inadequate server-side access control va…
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Medium 4.3
An Insecure Direct Object Reference (IDOR) vulnerability was discovered in ONLYOFFICE DocSpace before 3.2.1. The flaw e…
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Medium 5.3
Authorization Bypass Through User-Controlled Key in OutSystems Lifetime
OutSystems Lifetime is vulnerable to Authorization Bypass Through User-Controlled Key vulnerability in ApplicationID parameter. Any authenticated user, can read the Change Log containing actions performed by other users as well as application name of any appl…
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Low 3.7
QuantumNous new-api Midjourney Image Relay Endpoint relay-router.go GetByOnlyMJId authorization
A security vulnerability has been detected in QuantumNous new-api up to 0.12.1. This affects the function RelayMidjourneyImage/GetByOnlyMJId of the file router/relay-router.go of the component Midjourney Image Relay Endpoint. Such manipulation leads to author…
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High 8.8
Azure Privileged Identity Management (PIM) Elevation of Privilege Vulnerability
Authorization bypass through user-controlled key in Azure Privileged Identity Management (PIM) allows an authorized attacker to elevate privileges over a network.
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Low 3.1
TypeBot: Cross-Typebot Result Data Access via Missing typebotId Filter
TypeBot is a chatbot builder tool. In versions 3.15.2 and prior, the bot engine's the findResult query does not filter results by typebotId, allowing an authenticated user to load result data (user answers, variable values) from a different typebot by supplyi…
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High 7.1
TypeBot: Cross-Workspace Credential Theft via Bot-Engine Preview Endpoint
TypeBot is a chatbot builder tool. In versions 3.15.2 and prior, the fix for GHSA-4xc5-wfwc-jw47 ("Credential Theft via Client-Side Script Execution and API Authorization Bypass") is incomplete. While the builder's getCredentials tRPC endpoint was patched wit…
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Medium 6.5
Typebot: IDOR in Result Logs Endpoint Allows Cross-Workspace Data Disclosure
Typebot is a chatbot builder tool. In versions 3.15.2 and prior, the getResultLogs API endpoint authorizes the caller against the provided typebotId but fetches logs solely by resultId without verifying that the result belongs to the authorized typebot, leadi…
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Low 2.6
Authorization bypass in the entry duplication feature in Devolutions Server allows an authenticated user with write acc…
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Low 2.3CVE-2026-8347 Public exploit
Concrete CMS 9.5.0 and below is vulnerable to IDOR + wrong-authorization-level in Express association Reorder dialog
Concrete CMS 9.5.0 and below is vulnerable to IDOR + wrong-authorization-level in the Express association Reorder dialog. This can cause Cross-entity state tampering with view-only permission on one entry. To be affected, a website has to be using express an…
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Medium 5.9
Improper file ownership validation in the Boards API allows unauthorised file access
Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to validate file ownership and access control, which allows an authenticated user to access and download files belonging to other users or teams via crafted Boa…
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High 7.5CVE-2026-8679 Scanner template
AudioIgniter Music Player <= 2.0.2 - Unauthenticated Insecure Direct Object Reference to 'audioigniter_playlist_id' Parameter
The AudioIgniter plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions up to, and including, 2.0.2. This is due to the handle_playlist_endpoint() function (hooked to template_redirect) accepting a user-controlled playlist ID via t…
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Low 2.3
Concrete CMS 9.5.0 and below is vulnerable to IDOR in AddMessage/UpdateMessage via attachments[] parameter
Concrete CMS 9.5.0 and below is vulnerable to IDOR in AddMessage/UpdateMessage via attachments[] parameter which can lead to file permission bypass. The `AddMessage` and `UpdateMessage` conversation controllers accept user-supplied file attachment IDs and loa…
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Medium 6.3CVE-2026-8337 Public exploit
Concrete CMS 9.5.0 and below is vulnerable to IDOR in surveys when sites are running concurrent public surveys and private surveys
Concrete CMS 9.5.0 and below is vulnerable to IDOR in surveys. To be vulnerable, a site would have to be configured in such a way that both public and private surveys are present on the site. An unauthenticated attacker can vote in the restricted survey by su…
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Medium 6.3
Concrete CMS 9.5.0 and below is vulnerable to IDOR in the Express Entry Detail block
Concrete CMS 9.5.0 and below is subject to Insecure Direct Object Reference (IDOR) in the Express Entry Detail block via the exEntryID parameter. This IDOR leads to unauthorized access to all Express form submissions. The Concrete CMS security team gave this …
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Medium 6.3
Concrete CMS 9.5.0 and below is vulnerable to Authorization Bypass in the Calendar Event Frontend Dialog
Concrete CMS 9.5.0 and below is vulnerable to authorization Bypass in the Calendar Event Frontend Dialog which can allow cross-calendar data disclosure. A public calendar block can be used as a pivot point to access private calendar data. The Concrete CMS sec…
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High 8.8CVE-2026-47101 Public exploit
LiteLLM < 1.83.14 Privilege Escalation via API Key Generation
LiteLLM prior to 1.83.14 allows an authenticated internal_user to create API keys with access to routes that their role does not permit. When generating a key, the allowed_routes field is stored without verifying that the specified routes fall within the user…
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High 7.5
IDOR in PosCube's QR Menu
Authorization bypass through User-Controlled key vulnerability in PosCube Hardware Software and Consulting Ltd. QR Menu allows Exploitation of Trusted Identifiers. This issue affects QR Menu: through 21052026. NOTE: The vendor was contacted early about this d…
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High 8.1
Apache Camel K: Camel K Cross-Namespace Build Deputy Attack
(Externally Controlled Reference to a Resource in Another Sphere), (Authorization Bypass Through User-Controlled Key) vulnerability in Apache Camel K. Authorized users in a Kubernetes namespace can create a Build resource, controlling the Pod generation in a …
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Medium 4.3
Broadstreet <= 1.52.2 - Authenticated (Subscriber+) Private Post Meta Disclosure via get_sponsored_meta
The Broadstreet plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 1.52.2 via the get_sponsored_meta AJAX action due to missing validation on a user controlled key. This makes it possible for authentic…
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Critical 10.0
Unauthenticated SOAP Endpoint in Altium 365 SearchService Allows Cross-Tenant Data Exfiltration and Index Destruction
A missing authentication vulnerability exists in the Altium 365 SearchService. A legacy SOAP endpoint exposes search index operations without requiring authentication, session tokens, or any form of identity verification. An unauthenticated network attacker w…
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High 8.3
Unauthorized ShadowAttribute modification in MISP via client-supplied identifier
A vulnerability was identified in the ShadowAttribute proposal creation workflow. The add action accepted user-controlled ShadowAttribute request data without removing the id field before saving the record. Because the underlying framework treats a supplied p…
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Medium 6.4
Keycloak: cross-session email verification proof not bound to upstream identity in first-broker-login
A flaw was found in Keycloak. The cross-session verification proof is keyed only by (local userId, idpAlias) and is not bound to the upstream identity that was actually verified, so a second upstream account on the same IdP can consume it and get linked to th…
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Low 2.3
Cross-session PubSub topic injection via URL parameter in phoenix_storybook
Authorization Bypass Through User-Controlled Key vulnerability in phenixdigital phoenix_storybook allows cross-session PubSub topic injection via a URL query parameter. 'Elixir.PhoenixStorybook.Story.ComponentIframeLive':handle_params/3 in lib/phoenix_storybo…
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Medium 4.3
Photo Gallery, Sliders, Proofing and Themes <= 4.2.0 - Insecure Direct Object Reference to Authenticated (Subscriber+) Image Deletion via REST API
The Photo Gallery, Sliders, Proofing and Themes – NextGEN Gallery plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions up to and including 4.2.0. This is due to insufficient object-level authorization in the image deletion REST f…
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Medium 6.5
Oliver POS <= 2.4.2.6 - Unauthenticated Authorization Bypass Through User-Controlled Key to 'OliverAuth' Header
The Oliver POS – A WooCommerce Point of Sale (POS) plugin for WordPress is vulnerable to Authorization Bypass Through User-Controlled Key in all versions up to and including 2.4.2.6. The plugin protects its entire /wp-json/pos-bridge/* REST API namespace thro…
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Critical —
MCP Gateway: Authority-injection and JWT/session bypass via the unauthenticated router hair-pin "router-key" / "mcp-init-host" path
## Summary The MCP router (ext_proc) exposes an `initialize`-method code path that, when a request carries an `mcp-init-host` header, bypasses the gateway JWT session validator and rewrites the upstream `:authority` header to whatever the caller chooses, gate…
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Critical 9.3
Authentication Bypass in Sparx Pro Cloud Server
Sparx Pro Cloud Server requires authentication based on requested URL. An attacker can omit the "model" query parameter and send the model name only in the binary blob in POST request allowing SQL query execution without authentication. The vendor was notifie…
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Medium 6.5
Keycloak: keycloak: information disclosure via oidc token introspection endpoint audience bypass
A flaw was found in Keycloak. This access control vulnerability in Keycloak's OpenID Connect (OIDC) token introspection endpoint allows a confidential client to bypass audience restrictions. An attacker-controlled client with valid credentials can retrieve se…
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Medium 4.9
Keycloak: org.keycloak.services: keycloak: information disclosure via evaluate-scopes admin api
A flaw was found in Keycloak. A low-privilege administrator with the 'view-clients' role can exploit this by invoking the 'evaluate-scopes' Admin API endpoints with an arbitrary user ID (userId) parameter. This vulnerability allows for cross-role personally i…
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Medium 6.8
Keycloak: keycloak: unauthorized resource access and data modification via insecure direct object reference
A flaw was found in Keycloak. An authenticated client could exploit an Insecure Direct Object Reference (IDOR) vulnerability in the Authorization Services Protection API endpoint. By knowing or obtaining a resource's unique identifier (UUID) belonging to anot…
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Medium 6.9
Broken Access Control in extension "Frontend User Registration" (sf_register)
The create and edit flows do not restrict which user properties may be submitted and do not enforce access control on the frontend user group assignment. As a result, an attacker can assign an arbitrary frontend user group to a newly registered or edited acco…
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Medium 5.3
MantisBT: Authorization Bypass in Global Profile Creation
Mantis Bug Tracker (MantisBT) is an open source issue tracker. Versions 2.28.0 and 2.28.1 allow a low-privileged authenticated user assigned the "add_profile_threshold" permission to create a global profile despite not having manage_global_profile_threshold, …
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Medium 5.9
Dify < 1.14.2 Authorization Bypass via File Preview Endpoint
Dify before version 1.14.2 contains an authorization bypass vulnerability in the file preview endpoint that allows any authenticated user to read up to 3,000 characters of any uploaded document across all tenants and workspaces using only the file's UUID. Att…
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Critical 9.1
Dify < 1.14.2 Authorization Bypass via Trace Configuration Endpoints
Dify before version 1.14.2 contains an authorization bypass vulnerability that allows authenticated editor users to set and enable trace configurations for any application regardless of tenant ownership. Attackers can exploit missing tenant ownership checks i…
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Medium 6.3
Tencent WeKnora Config API Endpoint initialization.go getKnowledgeBaseForInitialization authorization
A vulnerability has been found in Tencent WeKnora up to 0.3.6. Affected by this issue is the function getKnowledgeBaseForInitialization of the file internal/handler/initialization.go of the component Config API Endpoint. The manipulation of the argument kbId …
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Medium 6.5
Open WebUI: Indirect Object Reference (IDOR) in user notes
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.8.11, the API /api/v1/notes/{note_id} endpoint lacks proper authorization checks, allowing authenticated users to retrieve notes belonging to other u…
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High 8.3
Open WebUI: Inconsistent authorization controls within memories API
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.6.19, authorization controls surrounding the memories API were inconsistent, resulting in the ability of a standard user to delete, restore, and view…
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High 8.1
Open WebUI: Cross-User File Access via Unchecked file_id in Folder Knowledge and Knowledge-Base Attach Endpoints
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.5, multiple endpoints accept a user-supplied file_id and attach the referenced file to a resource the caller controls (folder knowledge, knowledge-…