Auth bypass in Avideo
CVE-2026-56345
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.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (36.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 36.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Avideo — versions 0
Weakness classification (CWE)
References
- github.com/WWBN/AVideo/security/advisories/GHSA-qxvm-r42f-5p8j (vendor-advisory)
- www.vulncheck.com/advisories/avideo-arbitrary-user-session-hijacking-via-meet-p… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-56345?
- CVE-2026-56345 is a high-severity vulnerability in Avideo, classified under Improper Authentication. CVSS score: 8.1/10. Published 2026-06-20.
- How severe is CVE-2026-56345?
- High severity. CVSS v3 base score is 8.1 out of 10.