SSRF in Wwbn Avideo
CVE-2026-33480
WWBN AVideo is an open source video platform. In versions up to and including 26.0, the `isSSRFSafeURL()` function in AVideo can be bypassed using IPv4-mapped IPv6 addresses (`::ffff:x.x.x.x`). The unauthenticated `plugin/LiveLinks/proxy.php` endpoint uses this function to validate URLs before fetching them with curl, but the IPv4-mapped IPv6 prefix passes all checks, allowing an attacker to access cloud metadata services, internal networks, and localhost services. Commit 75ce8a579a58c9d4c7aafe453fbced002cb8f373 contains a patch.
Vulnerability class: SSRF (Server-Side Request Forgery)
EPSS: 0.003 (24.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N.
Affected products
- Wwbn Avideo — versions <= 26.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-33480?
- CVE-2026-33480 is a high-severity vulnerability in Wwbn Avideo, classified under Server-Side Request Forgery (SSRF). CVSS score: 8.6/10. Published 2026-03-23.
- How severe is CVE-2026-33480?
- High severity. CVSS v3 base score is 8.6 out of 10.