CVE-2026-56345 AVideo - Arbitrary User Session Hijacking via Meet Plugin uploadRecordedVideo Endpoint
Attackers can hijack any user session, including admin, by exploiting an authorization bypass in the Meet plugin's video upload endpoint.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-56345?
CVE-2026-56345 is a critical authentication bypass vulnerability in AVideo, published on 20 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-287
Which versions are affected by CVE-2026-56345?
2 open source packages ship an affected version, including WWBN/AVideo.
| Package | Affected | Fixed in |
|---|---|---|
WWBN/AVideo Packagist | All versions to 29.0 | None |
WWBN/AVideo Packagist | All versions to 29.0 | None |
How do I fix CVE-2026-56345?
No fix has been published for CVE-2026-56345 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-56345 being exploited?
There is no known exploitation of CVE-2026-56345 in the wild and no public exploit code.
Sources
Also known as GHSA-jfp8-jxr2-p2jh, GHSA-qxvm-r42f-5p8j.