CVE-2026-33492

WWBN AVideo is an open source video platform. In versions up to and including 26.0, AVideo's `_session_start()` function accepts arbitrary session IDs via the `PHPSESSID` GET parameter and sets them as the active PHP session. A session regeneration bypass exists for specific blacklisted endpoints when the request originates from the same domain. Combined with the explicitly disabled session regeneration in `User::login()`, this allows a classic session fixation attack where an attacker can fix a victim's session ID before authentication and then hijack the authenticated session. Commit 5647a94d79bf69a972a86653fe02144079948785 contains a patch.

• CWE-384

• https://github.com/WWBN/AVideo/commit/5647a94d79bf69a972a86653fe02144079948785Patch
• https://github.com/WWBN/AVideo/security/advisories/GHSA-x3pr-vrhq-vq43Exploit, Mitigation, Vendor Advisory
• https://github.com/WWBN/AVideo/security/advisories/GHSA-x3pr-vrhq-vq43Exploit, Mitigation, Vendor Advisory

Published

Mar 23, 2026

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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