CVE-2026-40929: WWBN AVideo's missing CSRF protection in objects/commentDelete.json.php enables mass comment deletion against moderators and content creators

Published Apr 21, 2026
·
Updated

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.cookiesamesite=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.

Affected Software

2 affected components
WWBN AVideo<=29.0
WWBN AVideo<=29.0

Event History

Apr 21, 2026
CVE Published
via MITRE·10:16 PM
Data Sourced
via MITRE·10:16 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·11:16 PM
RemedyDescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

1

What is the severity of CVE-2026-40929?

CVE-2026-40929 is classified as a moderate severity vulnerability due to its potential for mass deletion of comments without authentication.

2

How do I fix CVE-2026-40929?

To remediate CVE-2026-40929, implement CSRF protection in the `objects/commentDelete.json.php` endpoint.

3

Which versions of WWBN AVideo are affected by CVE-2026-40929?

CVE-2026-40929 affects WWBN AVideo versions 29.0 and prior.

4

What type of attack does CVE-2026-40929 enable?

CVE-2026-40929 enables unauthorized mass comment deletion, impacting moderators and content creators.

5

Is there any workaround for CVE-2026-40929 while a patch is being developed?

Currently, the best workaround for CVE-2026-40929 is to restrict access to the `objects/commentDelete.json.php` endpoint until a patch is applied.

Contact

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