CVE-2026-40929 Details
Description
WWBN AVideo is an open source video platform. In versions 29.0 and prior, `objects/commentDelete.json.php` is a state-mutating JSON endpoint that deletes comments but performs no CSRF validation. It does not call `forbidIfIsUntrustedRequest()`, does not verify a CSRF/global token, and does not check `Origin`/`Referer`. Because AVideo intentionally sets `session.cookie_samesite=None` (to support cross-origin embed players), a cross-site request from any attacker-controlled page automatically carries the victim's `PHPSESSID`. Any authenticated victim who has authority to delete one or more comments (site moderators, video owners, and comment authors) can be tricked into deleting comments en masse simply by visiting an attacker page. Commit 184f36b1896f3364f864f17c1acca3dd8df3af27 contains a fix.
A vulnerability in WWBN AVideo versions through 29.0 allows for cross-site request forgery (CSRF) attacks on the comment deletion feature. The `objects/commentDelete.json.php` endpoint, which deletes comments, lacks proper CSRF protection. It does not validate requests for origin or referer, and relies on `$_REQUEST`, making it susceptible to CSRF via GET or POST requests. This vulnerability is exacerbated by AVideo's cookie policy, which allows cross-site requests to include the victim's session ID. As a result, an authenticated user with comment deletion privileges can be manipulated into deleting comments without their consent.
Users are advised to update to the patched version of AVideo, where this vulnerability has been addressed by adding the necessary CSRF validation to the comment deletion endpoint.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 22, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/WWBN/AVideo/security/advisories/GHSA-8qm8-g55h-xmqr | CISA-ADP | ExploitMitigationVendor Advisory |
| https://github.com/WWBN/AVideo/commit/184f36b1896f3364f864f17c1acca3dd8df3af27 | [email protected] | Patch |
| https://github.com/WWBN/AVideo/security/advisories/GHSA-8qm8-g55h-xmqr | [email protected] | ExploitMitigationVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-352 | Cross-Site Request Forgery (CSRF) | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| wwbn avideo | <= 29.0 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 23, 2026 | Initial Analysis | [email protected] |
| Apr 22, 2026 | CVE Modified | CISA-ADP |
| Apr 21, 2026 | New CVE Received | [email protected] |