CVE-2026-34247 MEDIUM

CVE-2026-34247: AVideo's IDOR in uploadPoster.php Allows Any Authenticated User to Overwrite Scheduled Live Stream Posters and Trigger False Socket Notifications

Vendor Wwbn

Product AVideo

Weakness CWE-862 · Missing authorization

Published March 27, 2026

Last update March 27, 2026

View on NVD All CVEs

CVSS base score

5.4/10

Attack vector Network

Attack complexity Low

Privileges required Low

User interaction None

Confidentiality Low

Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

What the vulnerability does

Description

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.

Key dates

Disclosure timeline

March 27, 2026 CVE published

March 27, 2026 Record updated