Common Weakness Enumeration
CWE-639
AllowedAuthorization Bypass Through User-Controlled Key
Abstraction: Base · Status: Incomplete
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.
3342 vulnerabilities reference this CWE, most recent first.
CVE-2026-53675 (GCVE-0-2026-53675)
Vulnerability from cvelistv5 – Published: 2026-06-09 23:44 – Updated: 2026-06-10 12:59
VLAI
EPSS
VEX
Title
BuddyPress 14.4.0 Friends List IDOR via REST API
Summary
BuddyPress 14.4.0 contains an insecure direct object reference vulnerability in the friends REST API that allows any authenticated attacker to enumerate another user's complete friend list. Attackers can query the friends endpoint with an arbitrary user_id because the get_items_permissions_check method only verifies that the requester is logged in and never checks ownership of the requested list, resulting in disclosure of users' private social connections.
Severity
4.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://buddypress.org/ | product |
| https://wordpress.org/plugins/buddypress/ | product |
| https://www.vulncheck.com/advisories/buddypress-f… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| BuddyPress | BuddyPress |
Affected:
0 , ≤ 14.4.0
(semver)
|
Date Public
2026-06-09 00:00
Credits
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CVE-2026-53673 (GCVE-0-2026-53673)
Vulnerability from cvelistv5 – Published: 2026-06-09 23:44 – Updated: 2026-06-10 18:10
VLAI
EPSS
VEX
Title
BuddyPress 14.4.0 Private Message IDOR via REST API user_id Parameter
Summary
BuddyPress 14.4.0 contains an insecure direct object reference vulnerability in the messages REST API that allows authenticated attackers to access arbitrary private message threads by supplying a user_id parameter in the request. Attackers can pass another user's identifier to the get_item_permissions_check method, which validates the supplied user_id instead of the logged-in user and is reused by the update and delete handlers, to read, reply to, or delete any user's private messages.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://buddypress.org/ | product |
| https://wordpress.org/plugins/buddypress/ | product |
| https://www.vulncheck.com/advisories/buddypress-p… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| BuddyPress | BuddyPress |
Affected:
0 , ≤ 14.4.0
(semver)
|
Date Public
2026-06-09 00:00
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CVE-2026-53644 (GCVE-0-2026-53644)
Vulnerability from cvelistv5 – Published: 2026-07-06 22:51 – Updated: 2026-07-07 13:46
VLAI
EPSS
VEX
Title
FOSSBilling's missing order-state validation allows clients to read and reset API key secrets for non-active orders
Summary
FOSSBilling is a free, open-source billing and client management system. Versions 0.5.3 through 0.7.2 allow authenticated clients to both read and reset API key service secrets for orders that are no longer in an `active` state (e.g., `suspended`, `canceled`). The root cause is missing order-state validation in two client API endpoints, despite an `isActive()` helper already existing in the `Serviceapikey` module and the frontend UI correctly gating access on `order.status == 'active'`. Version 0.8.0 contains a fix. Some workarounds are available. If the `Serviceapikey` module is not needed, uninstall it to remove the affected endpoints. One may also use a reverse proxy or WAF to restrict access to `/api/client/order/service` and `/api/client/serviceapikey/reset` based on application-level order-state logic.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/FOSSBilling/FOSSBilling/securi… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| FOSSBilling | FOSSBilling |
Affected:
>= 0.5.3, < 0.8.0
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CVE-2026-53643 (GCVE-0-2026-53643)
Vulnerability from cvelistv5 – Published: 2026-07-06 22:49 – Updated: 2026-07-07 13:59
VLAI
EPSS
VEX
Title
FOSSBilling allows low-privileged staff accounts to perform unauthorized actions via admin API endpoints
Summary
FOSSBilling is a free, open-source billing and client management system. Versions prior to 0.8.0 allow low-privileged staff accounts to perform unauthorized actions via admin API endpoints. The root cause is a combination of the `can_always_access` module flag (which grants all staff access to certain modules) and insufficient permission checks or unsafe parameter handling on individual endpoints. Version 0.8.0 contains a fix. Some workarounds are available. Restrict staff accounts to only those who need access to sensitive settings and/or use a reverse proxy or WAF to restrict access to the affected endpoints to trusted IP addresses or higher-privilege roles.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/FOSSBilling/FOSSBilling/securi… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| FOSSBilling | FOSSBilling |
Affected:
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CVE-2026-53536 (GCVE-0-2026-53536)
Vulnerability from cvelistv5 – Published: 2026-07-16 18:48 – Updated: 2026-07-18 03:06
VLAI
EPSS
VEX
Title
Activepieces: Cross-tenant file download via missing JWT audience check on step-files signed URL
Summary
Activepieces is an open source AI workflow automation platform. Prior to 0.83.0, the /v1/step-files/signed download endpoint verified the supplied JWT against the shared signing secret but did not check the token's audience, and combined with a missing null-check on the decoded fileId, this allowed any caller holding any valid Activepieces JWT (including a freshly created user's own access token) to receive a step-file belonging to another tenant. The file returned was whatever PostgreSQL happened to scan first for type = FLOW_STEP_FILE, varying over time as the database changed, so an authenticated user could obtain step-file attachments belonging to other tenants on the same instance; the attacker could not target a specific victim or file, and the access was read-only with no integrity or availability impact. This issue is fixed in version 0.83.0.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/activepieces/activepieces/secu… | x_refsource_CONFIRM |
| https://github.com/activepieces/activepieces/comm… | x_refsource_MISC |
| https://github.com/activepieces/activepieces/comm… | x_refsource_MISC |
| https://github.com/activepieces/activepieces/rele… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| activepieces | activepieces |
Affected:
< 0.83.0
|
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CVE-2026-53471 (GCVE-0-2026-53471)
Vulnerability from cvelistv5 – Published: 2026-06-10 13:55 – Updated: 2026-06-10 16:02
VLAI
EPSS
VEX
Title
Migration-planner: agent api ignores jwt source_id claim
Summary
A flaw was found in migration-planner. The agent-API middleware processes JSON Web Tokens (JWTs) for authentication, but its UpdateSourceInventory and UpdateAgentStatus handlers fail to validate the source_id claim within these tokens against the requested source ID. This oversight allows an authenticated attacker with a valid agent token to manipulate data across different tenants, leading to a complete collapse of tenant isolation. This could result in unauthorized overwriting of victim inventory, planting of malicious credential URLs, or corruption of migration assessments.
Severity
9.6 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-53471 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2487070 | issue-trackingx_refsource_REDHAT |
| https://github.com/kubev2v/migration-planner/pull/1213 |
Date Public
2026-06-07 00:00
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CVE-2026-53470 (GCVE-0-2026-53470)
Vulnerability from cvelistv5 – Published: 2026-06-10 13:55 – Updated: 2026-06-10 14:43
VLAI
EPSS
VEX
Title
Migration-planner: getsourcedownloadurl missing organization check
Summary
A flaw was found in migration-planner. An authenticated attacker could exploit an improper access control vulnerability in the `/api/v1/sources/{id}/image-url` endpoint. This flaw allows the attacker to bypass an ownership check and obtain presigned S3 URLs for Open Virtual Appliance (OVA) images belonging to other users. Consequently, the attacker can download OVA images containing sensitive information, such as long-lived agent JSON Web Tokens (JWTs) and source configurations, potentially leading to unauthorized access and modification of the victim's source.
Severity
9.6 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
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|---|---|
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| https://bugzilla.redhat.com/show_bug.cgi?id=2487069 | issue-trackingx_refsource_REDHAT |
| https://github.com/kubev2v/migration-planner/pull/1218 |
Date Public
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CVE-2026-53447 (GCVE-0-2026-53447)
Vulnerability from cvelistv5 – Published: 2026-07-15 21:12 – Updated: 2026-07-16 18:48
VLAI
EPSS
VEX
Title
Wekan: `cloneBoard` Meteor method has no authorization check — any user can clone (read) any private board by ID
Summary
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Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/wekan/wekan/security/advisorie… | x_refsource_CONFIRM |
| https://github.com/wekan/wekan/commit/357de728c03… | x_refsource_MISC |
| https://github.com/wekan/wekan/releases/tag/v9.35 | x_refsource_MISC |
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CVE-2026-52869 (GCVE-0-2026-52869)
Vulnerability from cvelistv5 – Published: 2026-07-15 20:06 – Updated: 2026-07-16 13:00
VLAI
EPSS
VEX
Title
MCP Python SDK: HTTP transports serve session requests without verifying the authenticated principal
Summary
The MCP Python SDK, called mcp on PyPI, is a Python implementation of the Model Context Protocol (MCP). Prior to 1.27.2, the SSE and stateful Streamable HTTP transports mcp.server.sse.SseServerTransport and mcp.server.streamable_http_manager.StreamableHTTPSessionManager route requests to existing sessions using only the session_id query parameter or Mcp-Session-Id header without verifying the authenticated principal that created the session, allowing a different bearer-token-authenticated client with a known session ID to inject JSON-RPC messages into that session. This issue is fixed in version 1.27.2.
Severity
7.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/modelcontextprotocol/python-sd… | x_refsource_CONFIRM |
| https://github.com/modelcontextprotocol/python-sd… | x_refsource_MISC |
| https://github.com/modelcontextprotocol/python-sd… | x_refsource_MISC |
| https://github.com/modelcontextprotocol/python-sd… | x_refsource_MISC |
| https://github.com/modelcontextprotocol/python-sd… | x_refsource_MISC |
| https://github.com/modelcontextprotocol/python-sd… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| modelcontextprotocol | python-sdk |
Affected:
< 1.27.2
|
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CVE-2026-52841 (GCVE-0-2026-52841)
Vulnerability from cvelistv5 – Published: 2026-07-14 15:27 – Updated: 2026-07-14 15:45
VLAI
EPSS
VEX
Title
Easy!Appointments: Authorization bypass in Google OAuth provider binding lets any backend user rebind a peer provider's Google sync
Summary
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 against that row without checking the caller owns the provider. Any logged-in backend user (admin, provider, or secretary) rebinds a peer provider's Google sync to a Google account they control. The peer's appointments then sync into the attacker's calendar with each customer's name and email attached as attendee data. Version 1.6.0 patches the issue.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/alextselegidis/easyappointment… | x_refsource_CONFIRM |
| https://github.com/alextselegidis/easyappointment… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| alextselegidis | easyappointments |
Affected:
< 1.6.0
|
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Mitigation
Architecture and Design
For each and every data access, ensure that the user has sufficient privilege to access the record that is being requested.
Mitigation
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.
Mitigation
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.
No CAPEC attack patterns related to this CWE.