CVE-2026-40911

WWBN AVideo is an open source video platform. In versions 29.0 and prior, the YPTSocket plugin's WebSocket server relays attacker-supplied JSON message bodies to every connected client without sanitizing the `msg` or `callback` fields. On the client side, `plugin/YPTSocket/script.js` contains two `eval()` sinks fed directly by those relayed fields (`json.msg.autoEvalCodeOnHTML` at line 568 and `json.callback` at line 95). Because tokens are minted for anonymous visitors and never revalidated beyond decryption, an unauthenticated attacker can broadcast arbitrary JavaScript that executes in the origin of every currently-connected user (including administrators), resulting in universal account takeover, session theft, and privileged action execution. Commit c08694bf6264eb4decceb78c711baee2609b4efd contains a fix.

The following products are affected by CVE-2026-40911 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-40911.

URL	Resource
https://github.com/WWBN/AVideo/commit/c08694bf6264eb4decceb78c711baee2609b4efd
https://github.com/WWBN/AVideo/security/advisories/GHSA-gph2-j4c9-vhhr