CVE-2026-33647
AVideo Vulnerable to Remote Code Execution via MIME/Extension Mismatch in ImageGallery File Upload
HIGH 8.8EPSS 0.8%
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.
- Affected
- WWBN · AVideo
- CVSS v3.1 GITHUB
- 8.8 HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS
- 0.84% chance of exploitation in the next 30 days, 57th percentile
- Published
- 2026-03-23
- Updated
- 2026-03-24
Proof-of-concept exploits (1)
Security advisories
- WWBN/AVideo/security/advisories/GHSA-wxjw-phj6-g75w
- WWBN/AVideo/commit/345a8d3ece0ad1e1b71a704c1579cbf885d8f3ae