Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Wwbn | Avideo | <= 29.0 |
Related Weaknesses (CWE)
References
- https://github.com/WWBN/AVideo/commit/184f36b1896f3364f864f17c1acca3dd8df3af27Patch
- https://github.com/WWBN/AVideo/security/advisories/GHSA-8qm8-g55h-xmqrExploitMitigationVendor Advisory
- https://github.com/WWBN/AVideo/security/advisories/GHSA-8qm8-g55h-xmqrExploitMitigationVendor Advisory
FAQ
What is CVE-2026-40929?
CVE-2026-40929 is a vulnerability with a CVSS score of 5.4 (MEDIUM). 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 d...
How severe is CVE-2026-40929?
CVE-2026-40929 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-40929?
Check the references section above for vendor advisories and patch information. Affected products include: Wwbn Avideo.