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.