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
3,280 results · Feed
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Medium 6.5
Folder authorization bypass in the Git Sync provisioning files API
A user with edit access to one folder could modify, move or delete Git Sync provisioned resources in folders where they only had view access, through the provisioning files API (incorrect authorization).
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Medium 4.9
Photo Engine < 6.6.2 - Author+ Media Deletion via Collection Deletion
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High 8.8
iChart < 2.2.4 - Subscriber+ Arbitrary Post Read, Update and Deletion via IDOR
The iChart WordPress plugin before 2.2.4 does not perform capability or ownership checks in several of its AJAX actions, relying only on a nonce that any logged-in user can obtain, allowing users with a role as low as Subscriber to read, modify and permanentl…
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Low 2.2
Schema & Structured Data for WP & AMP < 1.70 - Contributor+ Structured Data Modification of Other Users' Posts via IDOR
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Low 2.7
Smush < 4.3.6 - Author+ Optimization and Restoration of Others' Attachments via IDOR
The Smush WordPress plugin before 4.3.6 does not verify that a user is authorised to act on the targeted media attachment, only checking a broad upload-files capability, which allows users with the Author role and above to optimise and restore attachments own…
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Medium 5.3
Data Tables Generator by Supsystic < 1.15.8 - Unauthenticated Table Content Disclosure via IDOR
The Data Tables Generator by Supsystic WordPress plugin before 1.15.8 does not perform any authorization or ownership check before returning the stored contents of a table, relying only on a nonce that is exposed to every anonymous visitor, allowing unauthent…
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High 8.1
WWBN AVideo through 29.7.1 Missing Authorization via Live Restream Endpoints
WWBN AVideo through 29.7.1 contains a missing authorization vulnerability in Live plugin restream endpoints that allows authenticated streamers to obtain other users' stream keys by supplying arbitrary live_transmitions_history_id values. Attackers can redeem…
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Medium 4.3
1Panel-dev CordysCRM before 1.9.6 Authorization Bypass via /account/contact/get/{id}
1Panel-dev CordysCRM before 1.9.6 contains an authorization bypass vulnerability in CustomerContactController.get that allows authenticated users to read other users' contacts because no organization, owner or data-scope check is applied. Attackers holding or…
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Medium 6.5
BeeS ERP administrative console IDOR
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Medium 4.3
Winter: My Account preview exposes another backend user's profile by record ID
Winter CMS is a content management system built on the Laravel PHP framework. From 1.2.13 until 1.2.14, the Backend\Controllers\MyAccount controller inherits the FormController actions create, update, and preview while declaring an empty $requiredPermissions …
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High 7.5
HarnessRouter: A workspace's API key could read and change sessions, files and responses of other workspaces in the same organization
HarnessRouter is a self-hosted unified API for agent harnesses. From version 0.4.2 until 0.31.7, routes that accept a session ID or response ID validate only the caller's organization and do not enforce the workspace scope of a non-default workspace API key. …
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High 8.8
Microsoft Exchange Server Elevation of Privilege Vulnerability
Authorization bypass through user-controlled key in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
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Medium 6.5
Microsoft Office SharePoint Information Disclosure Vulnerability
Authorization bypass through user-controlled key in Microsoft Office SharePoint allows an authorized attacker to disclose information over a network.
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High 7.8
Windows Remote Access Connection Manager Elevation of Privilege Vulnerability
Improper authentication in Windows Remote Access Connection Manager allows an authorized attacker to elevate privileges locally.
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Medium 5.5
Windows NTFS Tampering Vulnerability
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High 8.8
Azure DevOps Server Elevation of Privilege Vulnerability
Authorization bypass through user-controlled key in Azure DevOps Server allows an authorized attacker to elevate privileges over a network.
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High 8.8
Microsoft MCP Gateway Elevation of Privilege Vulnerability
Authorization bypass through user-controlled key in Microsoft MCP Gateway allows an authorized attacker to elevate privileges over a network.
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High 7.1
Cross-organization access to saved-search alerts in FlockOS
Missing authorization checks in the visual alert feature of FlockOS, Flock's hosted public safety platform, prior to 2026-09-28, allowed an authenticated user with permission to manage saved searches in their own organization to read, modify or delete another…
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Medium 5.0
Meteroid before 2.2.0 Cross-Tenant Authorization Bypass via UpdateCouponStatus
Meteroid before 2.2.0 contains a cross-tenant authorization bypass vulnerability in the CouponsService UpdateCouponStatus gRPC handler, whose UPDATE query filters only on coupon id and ignores tenant ID. Authenticated users with catalog:manage or a tenant-sco…
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Medium 4.3
Parabol before 15.21.2 Missing Authorization via addReactjiToReactable Mutation
Parabol before 15.21.2 contains a missing authorization vulnerability in the addReactjiToReactable GraphQL mutation that allows authenticated users to tamper with reactions on other organizations' content. Attackers can pair their own meetingId with a reactab…
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Medium 4.2
TaxHacker through 0.8.5 IDOR via Settings Server Actions userId
TaxHacker through 0.8.5 contains an insecure direct object reference vulnerability in app/(app)/settings/actions.ts that allows authenticated users to modify other users' data by supplying an arbitrary userId. Attackers can invoke Server Actions like deleteCa…
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High 8.6
Mass assignment of organization, product and deployment group IDs allows users to write into other organizations and receive their firmware
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Medium 5.3
Authentication bypass in com_check
An unauthenticated remote attacker can perform an authentication bypass on the com_check function, potentially triggering traffic on other systems and email alerts. This can result in some loss of availability due to higher system loads.
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Medium 6.5
Security Vulnerabilities SAP NetWeaver Application Server Java (NWDI Cockpit)
SAP NetWeaver Application Server Java (NWDI Cockpit)� does not perform sufficient authorization checks for certain functionality that retrieves sensitive information. An attacker with low privileges could send a specially crafted request to access sensitive i…
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Medium 5.4
Faveo Helpdesk through 2.0.3 Cross-Department Ticket Tampering via TicketController
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Low 3.1
Movim through 0.35.5 Authorization Bypass via Post::ajaxGetPost Cached Post Read
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Medium 5.4
MrDoc through 1.1.1 Missing Authorization via Project Document Sort Handlers
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Medium 4.3
REBUILD before 4.5.3 Authorization Bypass via Feeds Details and Comments Endpoints
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High 8.1
TrailBase 0.28.2 < 0.35.10 IDOR via Record API File Column
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Medium 5.3
Temporal Server workflow-history pagination token is not bound to the requested namespace and workflow
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Medium 4.3
iomad PDF Certificate lib.php local_iomad_pluginfile authorization
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Medium 4.9
Fusion Page Builder < 1.7.1 - Contributor+ Arbitrary Post Trashing via IDOR
The Fusion Page Builder WordPress plugin before 1.7.1 does not check that the user owns the content it moves to the trash, which could allow users with a role as low as Contributor to trash arbitrary posts and pages, or delete them permanently where the trash…
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Medium 5.3
ClassroomIO through 1.0.0 Cross-Organization Course Disclosure via Clone Endpoint
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Medium 6.5
OpenEMR before 8.4.0 Cross-Patient PHI Exfiltration via SMART Patient Launch
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High 7.1
OpenEMR before 8.3.0 IDOR via portal/lib/persist.php setting_patient
OpenEMR before 8.3.0 contains an insecure direct object reference vulnerability in portal/lib/persist.php that allows authenticated portal patients to modify other patients' settings by supplying an arbitrary setting_patient value. Attackers can insert or ove…
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High 7.1
OpenEMR before 8.3.0 Broken Object Authorization via SOAP Note Update API
OpenEMR before 8.3.0 contains a broken object-level authorization vulnerability in the SOAP note update API, which does not verify that the supplied SOAP note ID (sid) belongs to the supplied patient and encounter. Authenticated users with encounters/notes pe…
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Medium 6.5
OpenEMR before 8.3.0 BOLA via portal_custom_report.php Exposes Patient Problem Lists
OpenEMR before 8.3.0 contains a broken object level authorization vulnerability in portal/report/portal_custom_report.php that allows authenticated portal patients to read other patients' problem list entries. Attackers can enumerate sequential IDs in issue_ …
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Medium 6.5
OpenEMR before 8.4.0 FHIR Patient Compartment Bypass via QuestionnaireResponse
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Medium 6.5
OpenEMR before 8.3.0 IDOR in Patient Portal PortalPatientController
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Medium 5.3
OpenEMR before 8.4.0 Authorization Bypass via checkUserHasAccessToPatient in SMART on FHIR
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