Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Wwbn | Avideo | <= 26.0 |
Related Weaknesses (CWE)
References
- https://github.com/WWBN/AVideo/commit/345a8d3ece0ad1e1b71a704c1579cbf885d8f3aePatch
- https://github.com/WWBN/AVideo/security/advisories/GHSA-wxjw-phj6-g75wExploitVendor Advisory
FAQ
What is CVE-2026-33647?
CVE-2026-33647 is a vulnerability with a CVSS score of 8.8 (HIGH). 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 ...
How severe is CVE-2026-33647?
CVE-2026-33647 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-33647?
Check the references section above for vendor advisories and patch information. Affected products include: Wwbn Avideo.