What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-03-23 · updated 2026-06-17
• Weakness: CWE-434

Description

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 products

• WWBN AVideo: through 26.0

References

• https://github.com/WWBN/AVideo/commit/345a8d3ece0ad1e1b71a704c1579cbf885d8f3ae
• https://github.com/WWBN/AVideo/security/advisories/GHSA-wxjw-phj6-g75w

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