EUVD-2026-14504
GHSA-8wf4-c4x3-h952
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
3Tags
Description
WWBN AVideo is an open source video platform. In versions up to and including 26.0, the `downloadVideoFromDownloadURL()` function in `objects/aVideoEncoder.json.php` saves remote content to a web-accessible temporary directory using the original URL's filename and extension (including `.php`). By providing an invalid `resolution` parameter, an attacker triggers an early `die()` via `forbiddenPage()` before the temp file can be moved or cleaned up, leaving an executable PHP file persistently accessible under the web root at `videos/cache/tmpFile/`. Commit 6da79b43484099a0b660d1544a63c07b633ed3a2 contains a patch.
Analysis
WWBN AVideo versions up to and including 26.0 contain a critical file upload vulnerability (CWE-434) that allows authenticated attackers to upload and execute arbitrary PHP code on the server. The vulnerability exists in the downloadVideoFromDownloadURL() function which saves remote content with its original filename and extension to a web-accessible directory; by providing an invalid resolution parameter, attackers can bypass cleanup mechanisms, leaving executable PHP files persistent under the web root. …
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Remediation
Within 24 hours: Identify all WWBN AVideo deployments and document current versions; disable remote file download functionality if operationally feasible. Within 7 days: Implement network-level restrictions limiting file upload endpoints to trusted sources only; conduct access review of authenticated user accounts. …
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External POC / Exploit Code
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