CVE-2026-40911
CriticalSummary
AVideo to otwartoźródłowa platforma wideo. W wersjach 29.0 i wcześniejszych, serwer WebSocket wtyczki YPTSocket przesyła wiadomości JSON dostarczone przez atakującego do każdego podłączonego klienta bez sanitizacji pól `msg` lub `callback`. To umożliwia atakującemu wykonanie dowolnego kodu JavaScript w kontekście wszystkich aktualnie połączonych użytkowników.
Risk Assessment
Atakujący może przejąć konta użytkowników, w tym administratorów, kradnąc sesje i wykonując uprzywilejowane akcje. To stwarza poważne zagrożenie dla bezpieczeństwa organizacji.
Recommendation
Zaleca się aktualizację do wersji 29.1 lub nowszej, w której wprowadzono poprawki eliminujące tę podatność.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS