Vulnerability in Wwbn Avideo
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.004 (33.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 33.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
- Wwbn Avideo — versions <= 26.0
Weakness classification (CWE)
References
- github.com/WWBN/AVideo/security/advisories/GHSA-x3pr-vrhq-vq43 (Exploit, Mitigation, Vendor Advisory)
- github.com/WWBN/AVideo/commit/5647a94d79bf69a972a86653fe02144079948785 (Patch)
Frequently asked questions
- What is CVE-2026-33492?
- CVE-2026-33492 is a high-severity vulnerability in Wwbn Avideo, classified under Session Fixation. CVSS score: 7.3/10. Published 2026-03-23.
- How severe is CVE-2026-33492?
- High severity. CVSS v3 base score is 7.3 out of 10.