CVE-2026-33647— AVideo Vulnerable to Remote Code Execution via MIME/Extension Mismatch in ImageGallery File Upload

AVideo Vulnerable to Remote Code Execution via MIME/Extension Mismatch in ImageGallery File Upload

WWBN AVideo is an open source video platform. In versions up to and including 26.0, the `ImageGallery::saveFile()` method validates uploaded file content using `finfo` MIME type detection but derives the saved filename extension from the user-supplied original filename without an allowlist check. An attacker can upload a polyglot file (valid JPEG magic bytes followed by PHP code) with a `.php` extension. The MIME check passes, but the file is saved as an executable `.php` file in a web-accessible directory, achieving Remote Code Execution. Commit 345a8d3ece0ad1e1b71a704c1579cbf885d8f3ae contains a patch.

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

危险类型文件的不加限制上传

WWBN AVideo 代码问题漏洞

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及之前版本存在代码问题漏洞，该漏洞源于ImageGallery::saveFile方法缺少扩展名白名单检查，可能导致远程代码执行攻击。

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