What’s Vulnerable › Vulnerabilities

CVE-2026-33492: AVideo has Session Fixation via GET PHPSESSID Parameter With Disabled Login Session Regeneration

• Severity: high (CVSS 7.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-03-23 · updated 2026-06-17
• Weakness: CWE-384

Description

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.

Affected products

• WWBN AVideo: through 26.0

References

• https://github.com/WWBN/AVideo/commit/5647a94d79bf69a972a86653fe02144079948785
• https://github.com/WWBN/AVideo/security/advisories/GHSA-x3pr-vrhq-vq43
• https://github.com/WWBN/AVideo/security/advisories/GHSA-x3pr-vrhq-vq43

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