CVE-2026-34247
March 27, 2026
WWBN AVideo is an open source video platform. In versions up to and including 26.0, the "plugin/Live/uploadPoster.php" endpoint allows any authenticated user to overwrite the poster image for any scheduled live stream by supplying an arbitrary "live_schedule_id". The endpoint only checks "User::isLogged()" but never verifies that the authenticated user owns the targeted schedule. After overwriting the poster, the endpoint broadcasts a "socketLiveOFFCallback" notification containing the victim's broadcast key and user ID to all connected WebSocket clients. Commit 5fcb3bdf59f26d65e203cfbc8a685356ba300b60 fixes the issue.
Related Resources (4)
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Contact UsCVSS v4
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.4
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Missing Authorization
EPSS
Base Score:
0.01
