CVE-2026-34728: phpMyFAQ: Path Traversal - Arbitrary File Deletion in MediaBrowserController

April 1, 2026 (updated April 6, 2026)

The MediaBrowserController::index() method handles file deletion for the media browser. When the fileRemove action is triggered, the user-supplied name parameter is concatenated with the base upload directory path without any path traversal validation. The FILTER_SANITIZE_SPECIAL_CHARS filter only encodes HTML special characters (&, ', ", <, >) and characters with ASCII value < 32, and does not prevent directory traversal sequences like ../. Additionally, the endpoint does not validate CSRF tokens, making it exploitable via CSRF attacks.

References

github.com/advisories/GHSA-38m8-xrfj-v38x
github.com/thorsten/phpMyFAQ
github.com/thorsten/phpMyFAQ/releases/tag/4.1.1
github.com/thorsten/phpMyFAQ/security/advisories/GHSA-38m8-xrfj-v38x
nvd.nist.gov/vuln/detail/CVE-2026-34728

Code Behaviors & Features

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