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.

CVSS v3 10.0 CRITICAL

10.0^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://github.com/WWBN/AVideo/commit/c08694bf6264eb4decceb78c711baee2609b4efd	Patch
https://github.com/WWBN/AVideo/security/advisories/GHSA-gph2-j4c9-vhhr	Exploit Vendor Advisory
https://github.com/WWBN/AVideo/security/advisories/GHSA-gph2-j4c9-vhhr	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:wwbn:avideo:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-04-21 21:16

Updated : 2026-06-17 10:45

NVD link : CVE-2026-40911

Mitre link : CVE-2026-40911

CVE.ORG link : CVE-2026-40911

JSON object : View

Products Affected

wwbn

avideo

CWE

CWE-94

Improper Control of Generation of Code ('Code Injection')

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