CVE-2026-8378: Unknown Frontend File Manager Plugin

Medium severity, CVSS 5.4. EPSS: 0.2% chance of exploitation in the next 30 days.

The Frontend File Manager Plugin WordPress plugin through 23.6 does not sanitise nor escape a filename submitted to the frontend file-rename endpoint before storing it as post meta and rendering it back on the admin File Manager listing, leading to a Stored Cross-Site Scripting vulnerability exploitable by users with Subscriber-level access and above against an administrator viewing the file management interface.

Affected products

• Unknown Frontend File Manager Plugin: up to and including 23.6

Published 2026-06-23. Last modified 2026-06-23.