Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 44.3%
CVSS Severity
CVSS v3 Score 10.0
Products affected by CVE-2026-40911
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cpe:2.3:a:wwbn:avideo:10.1
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cpe:2.3:a:wwbn:avideo:10.2
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cpe:2.3:a:wwbn:avideo:10.4
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cpe:2.3:a:wwbn:avideo:10.8
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cpe:2.3:a:wwbn:avideo:11.1
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cpe:2.3:a:wwbn:avideo:11.1.1
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cpe:2.3:a:wwbn:avideo:11.5
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cpe:2.3:a:wwbn:avideo:11.6
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cpe:2.3:a:wwbn:avideo:12.4
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cpe:2.3:a:wwbn:avideo:14.2
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cpe:2.3:a:wwbn:avideo:14.3
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cpe:2.3:a:wwbn:avideo:14.3.1
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cpe:2.3:a:wwbn:avideo:14.4
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cpe:2.3:a:wwbn:avideo:2.2
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cpe:2.3:a:wwbn:avideo:2.4
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cpe:2.3:a:wwbn:avideo:2.7
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cpe:2.3:a:wwbn:avideo:3.4
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cpe:2.3:a:wwbn:avideo:3.4.1
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cpe:2.3:a:wwbn:avideo:4.0
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cpe:2.3:a:wwbn:avideo:4.0.1
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cpe:2.3:a:wwbn:avideo:4.0.2
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cpe:2.3:a:wwbn:avideo:5.0
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cpe:2.3:a:wwbn:avideo:6.5
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cpe:2.3:a:wwbn:avideo:7.2
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cpe:2.3:a:wwbn:avideo:7.3
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cpe:2.3:a:wwbn:avideo:7.4
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cpe:2.3:a:wwbn:avideo:7.5
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cpe:2.3:a:wwbn:avideo:7.6
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cpe:2.3:a:wwbn:avideo:7.7
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cpe:2.3:a:wwbn:avideo:7.8
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cpe:2.3:a:wwbn:avideo:8.1
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cpe:2.3:a:wwbn:avideo:8.5
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cpe:2.3:a:wwbn:avideo:8.6
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cpe:2.3:a:wwbn:avideo:8.7
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cpe:2.3:a:wwbn:avideo:8.9
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cpe:2.3:a:wwbn:avideo:8.9.1