CSRF in Wwbn Avideo
CVE-2026-40925
WWBN AVideo is an open source video platform. In versions 29.0 and prior, `objects/configurationUpdate.json.php` (also routed via `/updateConfig`) persists dozens of global site settings from `$_POST` but protects the endpoint only with `User::isAdmin()`. It does not call `forbidIfIsUntrustedRequest()`, does not verify a `globalToken`, and does not validate the Origin/Referer header. Because AVideo intentionally sets `session.cookie_samesite=None` to support cross-origin iframe embedding, a logged-in administrator who visits an attacker-controlled page will have the browser auto-submit a cross-origin POST that rewrites the site's encoder URL, SMTP credentials, site `<head>` HTML, logo, favicon, contact email, and more in a single request. Commit f9492f5e6123dff0292d5bb3164fde7665dc36b4 contains a fix.
Vulnerability class: CSRF (Cross-Site Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L.
EPSS exploit prediction
EPSS: 0.002 (8.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 8.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Wwbn Avideo — versions <= 29.0
Weakness classification (CWE)
References
- github.com/WWBN/AVideo/security/advisories/GHSA-vvfw-4m39-fjqf (Exploit, Vendor Advisory)
- github.com/WWBN/AVideo/commit/f9492f5e6123dff0292d5bb3164fde7665dc36b4 (Patch)
Frequently asked questions
- What is CVE-2026-40925?
- CVE-2026-40925 is a high-severity vulnerability in Wwbn Avideo, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.3/10. Published 2026-04-21.
- How severe is CVE-2026-40925?
- High severity. CVSS v3 base score is 8.3 out of 10.