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
177 results · Clear filters · Feed
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Low 2.7
Quiz And Survey Master < 11.2.4 - Contributor+ Cross-Quiz Email and Results Configuration Disclosure via IDOR
The Quiz and Survey Master (QSM) WordPress plugin before 11.2.4 does not perform a per-object ownership check on the REST routes that return a quiz's email-notification and results-page configuration, allowing users with contributor-level access and above to …
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Low 2.7
Quiz And Survey Master < 11.2.4 - Contributor+ Arbitrary Quiz Text Settings Update via IDOR
The Quiz and Survey Master (QSM) WordPress plugin before 11.2.4 does not perform a per-object ownership check before saving a quiz's front-end text settings, allowing users with contributor-level access and above to modify the text settings of quizzes created…
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Low 2.7
Cross-repository label-ID enumeration oracle via unscoped DeleteIssueLabel API
Cross-repository label-ID enumeration oracle via unscoped DeleteIssueLabel API
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Low 3.7
Amelia < 2.4.6 - Provider+ Cross-Customer Appointment Data Disclosure via IDOR
The Booking for Appointments and Events Calendar WordPress plugin before 2.4.6 does not verify that an authenticated employee (provider) is assigned to the appointment being accessed, allowing any employee to read any appointment by its identifier and disclos…
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Low 3.8
Amelia Pro < 9.7 - Provider+ Arbitrary Customer Data Disclosure and Modification via IDOR
The Booking for Appointments and Events Calendar WordPress plugin before 9.7 does not verify that an authenticated employee (provider) is related to the customer whose record is being accessed, allowing any employee with an Employee Panel login to read and mo…
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Low 2.7
Slim SEO < 4.9.11 - Contributor+ Arbitrary Post Meta Disclosure
The Slim SEO WordPress plugin before 4.9.11 does not restrict a post-meta preview feature to posts the user is allowed to edit, verifying only read access, allowing users with the Contributor role to read arbitrary post meta, including protected and private k…
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Low 2.7
MultiVendorX < 5.0.11 - Store Owner+ Cross-Store Commission Data Disclosure via commissions REST Endpoint
The MultiVendorX WordPress plugin before 5.0.11 does not verify that the requested store belongs to the current user in one of its REST API endpoints, allowing any vendor-level user to read other vendors' commission and financial data.
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Low 2.7
Brizy - Page Builder < 2.8.19 - Contributor+ Template Type Update via IDOR
The Brizy WordPress plugin before 2.8.19 does not properly verify authorization on the object being modified before updating a template's type meta, validating a request parameter that is different from the one used in the write operation, allowing users with…
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Low 2.3
Misskey: Lack of proper permission checks in Direct Messaging feature
Misskey is an open source, federated social media platform. Versions 2025.3.2 and later, but prior to 2026.5.4, contain a vulnerability where a lack of proper permission checks allows access to certain data points from the Direct Messages (formerly Chat) feat…
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Low 2.7
TaxoPress < 3.51.0 - Contributor+ Private Post Disclosure via IDOR
The Tag, Category, and Taxonomy Manager WordPress plugin before 3.51.0 does not verify that a user is authorized to access a referenced post before processing it and returning derived data, allowing users with contributor privileges to disclose data from priv…
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Low 2.2
Event Tickets < 5.29.0.1 - Contributor+ Seating Layout and Ticket Inventory Modification via IDOR
The Event Tickets and Registration WordPress plugin before 5.29.0.1 does not properly verify authorization on some of its seating actions, allowing users with contributor-level access and above to overwrite the seating layout, ticket inventory, and attendee s…
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Low 2.7
Brizy – Page Builder < 2.8.18 - Contributor+ Sensitive Information Disclosure via get_post_info
The Brizy WordPress plugin before 2.8.18 does not properly verify authorization on a request handler before returning post content, allowing users with the Contributor role or higher to read the content of arbitrary posts, including other users' private, pend…
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Low 3.8
Fluent Support < 2.3.1 - Agent+ Arbitrary Ticket Customer Reassignment via IDOR
The Fluent Support WordPress plugin before 2.3.1 does not perform a per-ticket access check before reassigning a ticket's customer, allowing a restricted support agent to change the assigned customer of any ticket in the system, including tickets outside thei…
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Low 3.7
FluentCart < 1.5.3 - Unauthenticated Order PII Disclosure via Print Routes
The FluentCart A New Era of eCommerce WordPress plugin before 1.5.3 does not perform any authorization or ownership check before rendering customer order documents keyed on a sequential numeric identifier, allowing unauthenticated visitors to enumerate and di…
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Low 3.1
Insecure direct object reference vulnerability
An insecure direct object reference vulnerability in Koollab LMS allowed an authenticated user to query the course completion progress of any other user without authorisation, disclosing private learning progress information.
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Low 2.3
Missing authorization check in event quick setup view
The "quick setup" view presented to users after they first create an event allows to set up the most critical parts of an event in just a few clicks. This view did not properly check that the user has permission to change configuration for the given event. An…
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Low 2.7
RTMKit Addons for Elementor < 2.0.9 - Contributor+ Private Post Title Disclosure
The RTMKit WordPress plugin before 2.0.9 does not perform a capability check in one of its AJAX actions and resolves a request-supplied post identifier directly, allowing users with at least the Contributor role to read the titles of other users' private, dra…
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Low 3.1
Improper authorization in the secure messages deletion endpoint in Devolutions Server 2026.2.11, 2026.1.22 allows an au…
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Low 3.1
Easy!Appointments: Authorization bypass in Google OAuth provider binding lets any backend user rebind a peer provider's Google sync
Easy!Appointments is a self hosted appointment scheduler. In versions prior to 1.6.0, `Google::oauth` at `application/controllers/Google.php:278` stores its URL-supplied `provider_id` in the session, and `oauth_callback` saves the issued Google OAuth token ag…
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Low 3.3
Easy!Appointments appointments/store and appointments/update allow cross-provider appointment injection — Authorization Bypass
Easy!Appointments is a self hosted appointment scheduler. Versions prior to 1.6.0 correctly filter provider-scoped appointments in the `appointments/search` response, proving that provider isolation is an intended security boundary. However, the direct mutati…
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Low 2.7
WordPress User Profile Picture plugin <= 2.6.3 - Insecure Direct Object References (IDOR) vulnerability
Authorization Bypass Through User-Controlled Key vulnerability in Cozmoslabs User Profile Picture metronet-profile-picture allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects User Profile Picture: from n/a through <= 2.6…
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Low 2.3
ZITADEL: Cross-Tenant User Leakage via Recycled Identifiers
ZITADEL is an open source identity management platform. Prior to 4.15.1, ZITADEL's event store validation can retain the original resource owner for a deleted user identifier, causing a later user recreated with the same identifier in another organization to …
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Low 3.1
Open WebUI: Private channel messages can be disclosed through cross-channel thread parent_id binding
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. Prior to 0.10.0, channel thread parent and reply handling did not bind parent_id to the channel in the URL, allowing an authenticated user to reference a message from anothe…
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Low 3.7
glpi-project glpi Document document.send.php canViewFile authorization
A security vulnerability has been detected in glpi-project glpi 11.0.5/11.0.6/11.0.7. This affects the function Document::canViewFile of the file front/document.send.php of the component Document Handler. Such manipulation of the argument docid leads to autho…
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Low 2.3
Permissions where checked incorrectly during room creation, allowing attackers to create rooms of types they shouldn't …
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Low 2.3
NocoDB: Missing Ownership Check in MCP Attachment Read
NocoDB is software for building databases as spreadsheets. Prior to 2026.05.1, a low-privilege MCP token holder with knowledge of an attachment path could read any file in shared storage, including attachments belonging to other bases and workspaces, because …
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Low 2.7
UsersWP <= 1.2.63 - Insecure Direct Object Reference to Authenticated (Editor+) Arbitrary User Avatar/Banner Reset via 'user_id' Parameter
The UsersWP – Front-end login form, User Registration, User Profile & Members Directory plugin for WP plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 1.2.63 via the 'user_id' parameter due to missin…
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Low 3.7
Authorization Bypass Through User-Controlled Key in GitLab
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15.9 before 18.10.8, 18.11 before 18.11.5, and 19.0 before 19.0.2 that under certain conditions could have allowed an authenticated user with developer-role permissions to hide changes…
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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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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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Low 2.0
AnythingLLM: Legacy mobile device tokens bypass multi-user workspace scoping after mode migration
AnythingLLM is an application that turns pieces of content into context that any LLM can use as references during chatting. Prior to 1.13.0, an approved mobile device token created in single-user mode can survive single-user -> multi-user migration even when …
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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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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…
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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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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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Low 3.1
TypeBot: Cross-Typebot Result Data Access via Missing typebotId Filter
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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
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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…