What’s Vulnerable › Vulnerabilities

CVE-2026-56345: AVideo - Arbitrary User Session Hijacking via Meet Plugin uploadRecordedVideo Endpoint

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-20 · updated 2026-06-23
• Weakness: CWE-287

Description

AVideo through 29.0 contains an authorization bypass vulnerability in the Meet plugin's uploadRecordedVideo.json.php endpoint that derives the target users_id from the uploaded filename without verification. An attacker with knowledge of the Meet shared secret can craft a malicious file upload with a filename containing an arbitrary users_id to invoke passwordless User->login() and establish an authenticated session as any user including admin. Attackers can obtain the Meet shared secret through path-traversal vulnerabilities or timing attacks against checkToken.json.php, then POST a crafted file to uploadRecordedVideo.json.php with a filename like '1-anything.mp4' to hijack admin sessions and gain full account takeover.

Affected products

• WWBN AVideo: through 29.0

References

• https://github.com/WWBN/AVideo/security/advisories/GHSA-qxvm-r42f-5p8j
• https://www.vulncheck.com/advisories/avideo-arbitrary-user-session-hijacking-via-meet-plugin-uploadrecordedvideo-endpoint

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