CVE-2026-40925 json
WWBN AVideo has CSRF in configurationUpdate.json.php Enables Full Site Configuration Takeover Including Encoder URL and SMTP Credentials
published 2026-04-14 6 mo ago modified 2026-10-26 14 d ago also GHSA-vvfw-4m39-fjqf , EUVD-2026-24485
- cvss
- 8.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 6%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 6 mo ago
Exploit prediction
0.17% chance of exploitation in the next 30 days, higher than 6% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/WWBN/AVideo/security/advisories/GHSA-vvfw-4m39-fjqf referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L |
| GitHub | 3.1 | 8.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | wwbn/avideo | <=29.0 |
no fix listed |
Affected products
- WWBN AVideo
Classification
- Weakness
-
- CWE-352 Cross-Site Request Forgery
References
-
github.com
/WWBN/AVideo/commit/f9492f5e6123dff0292d5bb3164fde7665dc36b4
web, patch
-
github.com
/WWBN/AVideo/security/advisories/GHSA-vvfw-4m39-fjqf
exploit, web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-40925
advisory
-
github.com
/WWBN/AVideo
package
Sources
- CVE List CVE-2026-40925
- GitHub Advisory GHSA-vvfw-4m39-fjqf
- NVD CVE-2026-40925
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