WWBN AVideo's GIF poster fetch bypasses traversal scrubbing and exposes local files through public media URLs

WWBN AVideo is an open source video platform. In versions 26.0 and prior, objects/aVideoEncoderReceiveImage.json.php allowed an authenticated uploader to fetch attacker-controlled same-origin /videos/... URLs, bypass traversal scrubbing, and expose server-local files through the GIF poster storage path. The vulnerable GIF branch could be abused to read local files such as /etc/passwd or application source files and republish those bytes through a normal public GIF media URL.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L

对路径名的限制不恰当(路径遍历)

WWBN AVideo 路径遍历漏洞

WWBN AVideo是WWBN团队的一个由PHP编写的视频平台建站系统。 WWBN AVideo 26.0及之前版本存在路径遍历漏洞，该漏洞源于允许攻击者控制的同源URL绕过遍历清理，可能导致读取服务器本地文件。

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