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)
-
Architecture and Design
For each and every data access, ensure that the user has sufficient privilege to access the record that is being requested.
-
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.
-
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
3,304 results · Feed
-
Medium 4.3
xxyopen/201206030 novel Book Chapter Read BookServiceImpl.java getBookChapter authorization
A vulnerability was found in xxyopen/201206030 novel up to 3.5.0. Affected is the function getBookChapter of the file src/main/java/io/github/xxyopen/novel/service/impl/BookServiceImpl.java of the component Book Chapter Read Handler. Performing a manipulation…
-
Medium 4.7
RStudio Server / Posit Workbench localhost port-proxy does not enforce per-session port ownership
Authorization bypass through user-controlled key in the localhost port-proxy (/p/<token>/) in Posit Software, PBC RStudio Server and Posit Workbench before 2026.08.0 allows remote authenticated users to reach web applications and other services bound to 127.0…
-
Medium 4.3
ChatWiki before 2.10.0 Cross-Tenant IDOR via SaveFormField and UpdateFormRequired
ChatWiki before 2.10.0 contains an insecure direct object reference vulnerability in SaveFormField and UpdateFormRequired that allows authenticated users to modify other tenants' form fields. Attackers can pass their own form_id to satisfy the ownership check…
-
Medium 5.4
ChatWiki before 2.10.0 Cross-Tenant Fast Command Modification via saveFastCommand
ChatWiki before 2.10.0 contains an insecure direct object reference vulnerability that allows authenticated users to modify other tenants' fast commands by supplying arbitrary sequential ids to POST /manage/saveFastCommand. Attackers can overwrite another ten…
-
Medium 6.5
Everest Forms <= 3.6.2 - Insecure Direct Object Reference to Authenticated (Custom+) Arbitrary Entry/Form Disclosure and Deletion via MCP /tools/call JSON-RPC Endpoint
The Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder with AI plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 3.6.2 via the get_entry due to missing validation on a user…
-
Medium 5.4
In JetBrains YouTrack before 2026.2.19562 missing authorization in TeamCity integration allowed disclosure of other pro…
-
Medium 4.3
In JetBrains Datalore before 2026.4 improper owner validation allowed reading another workspace's issues and runs noteb…
-
Medium 6.5
undici vulnerable to cross-user cache disclosure via same-origin redirect
undici is an HTTP client for Node.js. In versions 7.0.0 through 7.30.1 and 8.0.0 through 8.12.3, when the redirect interceptor and a shared response cache are used together, an authenticated request that is redirected to a same-origin target has the final res…
-
High 8.8
MDJM Event Management and Mobile Events Manager <= 1.7.8.7 - Subscriber+ Account Takeover via IDOR
The MDJM Event Management and Mobile Events Manager WordPress plugins through 1.7.8.7 do not check ownership or capability on the identifier supplied to their client profile update, allowing any authenticated user, such as a subscriber, to change the password…
-
Low 2.7
PublishPress Revisions < 4.3.1 - Contributor+ Unpublished Content Disclosure via IDOR
The PublishPress Revisions: Duplicate Posts, Submit, Approve and Schedule Content Changes WordPress plugin before 4.3.1 does not verify that a user requesting to duplicate or revise a post has access to that specific post, only that they can edit posts of tha…
-
Medium 5.4
Kubeflow Pipelines: Cross-tenant execution-cache poisoning / output substitution via a namespace-blind cache key in the cache webhook (multi-user)
Kubeflow Pipelines enables users to build and deploy portable, scalable machine learning workflows. Prior to 2.18.0, the legacy V1/raw-Argo execution cache mutating webhook and cache-server storage path hash selected template fields without the Kubernetes nam…
-
Critical 9.6
Kubeflow Pipelines API server lacks authorization for shared pipeline uploads
Kubeflow Pipelines enables users to build and deploy portable, scalable machine learning workflows. Prior to 2.18.0, the multi-user HTTP endpoints POST /apis/v2beta1/pipelines/upload and POST /apis/v2beta1/pipelines/upload_version call canUploadVersionedPipel…
-
High 8.1
Rucio: Authorisation Bypass on REST API endpoint for signing URLs
Rucio is a scientific data management framework. From 1.16.1 until 35.9.0, 38.6.0, and 41.0.0rc1, the /credentials/signurl endpoint reads X-Rucio-Account instead of the account stored in request.environ['issuer'] by token authentication. Any authenticated low…
-
Critical 9.9
Insecure direct object reference (IDOR) vulnerability in the MatchPoint API
Insecure direct object reference (IDOR) vulnerability in the MatchPoint API, which relies on the `actingasuser` HTTP header without verifying the requester's authorization for the specified user. Manipulation of sequential identifiers allows access to persona…
-
Critical 9.6
OpenEMR: Missing Write ACL Allows Unauthorized Document Reassignment
OpenEMR is a free and open source electronic health records and medical practice management application. Prior to 8.4.0, controllers/C_Document.class.php write actions, including move_action_process(), do not verify the caller's access to the source document,…
-
High 7.1
SuiteCRM V8 JSON:API processAttributes() Missing ID Filter Allows ACL Bypass and Record Ownership Hijack
SuiteCRM is an open-source, enterprise-ready Customer Relationship Management (CRM) software application. Prior to 7.15.2 and 8.10.2, the V8 JSON:API update path fails to remove the id attribute before assigning user-supplied attributes to a SugarBean. The af…
-
Medium 6.5
SuiteCRM: Authorization Bypass via Document Revision ID Confusion in download.php
SuiteCRM is an open-source, enterprise-ready Customer Relationship Management (CRM) software application. Prior to 7.15.2 and 8.10.2, download.php checks authorization against a Documents bean before resolving whether the supplied identifier is a document_rev…
-
Medium 6.5
SuiteCRM: IDOR in generatePdf Entry Point Allows Record Data Exfiltration
SuiteCRM is an open-source, enterprise-ready Customer Relationship Management (CRM) software application. Prior to 7.15.2 and 8.10.2, the generatePdf entry point loads an arbitrary record through BeanFactory::getBean() without checking the requesting user's r…
-
Medium 6.5
SuiteCRM: Record-level Authorization Bypass via AOR_Reports changeReportPage
SuiteCRM is an open-source, enterprise-ready Customer Relationship Management (CRM) software application. Prior to 7.15.2 and 8.10.2, the changeReportPage controller action renders a protected report without repeating the record-level access check enforced by…
-
Medium 6.9
Joomla Extension - balbooa.com - Unauthenticated deletion of submission/field files in Gridbox < 2.20.5.0
Joomla Extension - balbooa.com - Unauthenticated deletion of submission/field files in Gridbox < 2.20.5.0
-
High 8.8
Immich: Album Editor can escalate to Owner role and remove Owner-role members via unguarded API endpoints
Immich is a self-hosted photo and video management solution. Prior to 3.0.3, an authenticated user with editor access to a shared album can change the existing owner's role because album member role updates do not protect the owner from modification. By demot…
-
Medium 4.3
Immich calendar heatmap endpoint discloses cross-user activity through broken access control
Immich is a high-performance self-hosted photo and video management solution. From 3.0.0 until 3.2.0, the GET /api/admin/users/{id}/calendar-heatmap route in server/src/controllers/user-admin.controller.ts uses the ordinary Permission.UserRead permission with…
-
Medium 5.3
Content Egg WordPress Plugin < 12.1.0 Unauthenticated Information Disclosure via render-blocks
Content Egg plugin for WordPress before 12.1.0 contains a broken access control vulnerability that allows unauthenticated attackers to retrieve Content Egg product data from unpublished posts by calling the REST route POST /wp-json/content-egg/v1/render-block…
-
Medium 5.3
Chevereto before 4.5.8 Private Album Image Disclosure via get-album-contents
Chevereto before 4.5.8 contains an authorization bypass vulnerability in the get-album-contents action of the /json route that allows unauthenticated attackers to list private albums by supplying another user's album id. Attackers with a session token from an…
-
Low 3.1
eventyay-exhibition through commit f68888e Cross-Event Attendee Data Disclosure via Lead Creation API
fossasia eventyay-exhibition through commit f68888e contains an authorization bypass vulnerability in the exhibitor lead creation API that allows exhibitors to access other organizers' attendee data. Exhibitors with lead scanning enabled can submit another ev…
-
Low 3.1
SplitPro through 2.1.6 Authorization Bypass via expense.getExpenseDetails
SplitPro through 2.1.6 contains an authorization bypass vulnerability that allows authenticated users to read other users' expenses by supplying arbitrary expenseId values to expense.getExpenseDetails. Attackers who obtain an expense UUID, such as removed for…
-
Medium 4.3
SplitPro through 2.1.6 Authorization Bypass via user.getUserDetails tRPC Query
SplitPro through 2.1.6 contains an authorization bypass vulnerability that allows authenticated users to retrieve any account's details by supplying arbitrary userId values to user.getUserDetails. Attackers can iterate sequential integer user ids to harvest e…
-
Medium 5.4
Apache OFBiz: Authorization Bypass Through User-Controlled Key in OrderServices Enables Unauthorized Payment Preference Modification
Authorization Bypass Through User-Controlled Key in the Order Manager component in Apache OFBiz 24.09.07 on all platforms allows an authenticated user with only view-level order permissions to modify or create OrderPaymentPreference records belonging to order…
-
Medium 5.4
Apache OFBiz: Authorization Bypass Through User-Controlled Key in Order Returns Enables Cross-Party OrderItem Association
Authorization Bypass Through User-Controlled Key in Order Returns in Apache OFBiz 24.09 before 24.09.08 on all platforms allows an authenticated user with low-privileged Order Manager access to associate another party's OrderItem with a ReturnItem on a Return…
-
Medium 6.5
Apache OFBiz: Authorization Bypass Through User-Controlled Key in Shopping Lists Enables Cross-Party Shopping List Modification
Authorization Bypass Through User-Controlled Key in the shopping list services in Apache OFBiz 24.09 before 24.09.08 on all platforms allows an authenticated low-privileged user, such as a self-registered ecommerce customer, to modify another party's shopping…
-
Medium 6.5
Apache OFBiz: Authorization Bypass Through User-Controlled Key in Content Viewing Enables Unauthorized Content Disclosure
Authorization Bypass Through User-Controlled Key in the content viewing component in Apache OFBiz 24.09 before 24.09.08 on all platforms allows an authenticated user with role-scoped content view permission to read the data of content they are not authorized …
-
Medium 4.3
Essential Real Estate < 5.3.5 - Customer+ Invoice PII Disclosure via IDOR
The Essential Real Estate WordPress plugin before 5.3.5 does not verify ownership of an invoice before rendering it in one of its AJAX actions, allowing an authenticated low-privileged user to read other users' invoices, including the invoice owner's name, ac…
-
High 8.2
WP Event Manager 3.4.0 - 3.4.1 - Unauthenticated Unpublished Post Overwrite via IDOR
The WP Event Manager WordPress plugin before 3.4.2 does not verify the ownership or the post type of a user supplied post identifier in its front-end event submission flow, allowing unauthenticated attackers to read and overwrite the content of arbitrary unpu…
-
High 8.1
WP Event Manager < 3.4.2 - Subscriber+ Arbitrary Post Takeover via event_organizer_ids
The WP Event Manager WordPress plugin before 3.4.2 does not properly validate ownership or the type of the user-supplied post identifiers processed by one of its frontend forms, allowing any user with a Subscriber account or above to reassign the authorship o…
-
High 8.5
Kyverno before 1.19.2 Label Spoofing via Generation Handler processRequest
Kyverno before 1.19.2 contains an authorization bypass vulnerability in the Generation Handler that allows users with create/update permissions to trigger synchronized generate policies by spoofing internal generate.kyverno.io labels. Attackers can label a Co…
-
Medium 6.5
VitaFit Cloud API IDOR via profile_id Endpoints
VitaFit cloud API before 2026-10-30 contained an insecure direct object reference vulnerability that allows authenticated attackers to access another user's data by supplying a different user_id or profile_id to endpoints such as GET /front/profile/{profile_i…
-
Medium 6.5
Readest: Subscription/entitlement hijack: /api/stripe/check binds any paid Checkout Session to the caller
Readest is a modern, feature-rich ebook reader designed for seamless cross-platform access and an intuitive reading experience. Prior to 0.11.10, POST /api/stripe/check in apps/readest-app/src/app/api/stripe/check/route.ts accepted a client-controlled session…
-
High 7.3
6amTech 6valley Social Login Flow existing-account-check existingAccountCheck authorization
A vulnerability was identified in 6amTech 6valley 16.0. Impacted is the function existingAccountCheck of the file /api/v1/auth/existing-account-check of the component Social Login Flow. Such manipulation of the argument user_response leads to authorization by…
-
High 8.8
GPUStack: Missing authorization on several cluster and resource endpoints allows cross-user access and cluster takeover
GPUStack is an open-source GPU cluster manager for AI model serving and GPU instance provisioning. From 2.2.0 until 2.2.2, cluster_apiserver_proxy forwarded an authenticated non-administrator's requests to a selected Kubernetes cluster without a resource-leve…
-
High 8.2
Telepresence: Tunnel endpoint accepts caller-supplied session ID with no ownership proof — active client sessions hijackable
Telepresence enables local development against a remote Kubernetes or OpenShift cluster. Prior to 2.31.0, the Traffic Manager Tunnel gRPC streaming endpoint parses a session ID from the first bytes of a caller-controlled message in pkg/tunnel/message.go and p…