CVE-2026-30934: Filebrowser

Medium severity, CVSS 5.4. EPSS: 0.4% chance of exploitation in the next 30 days.

FileBrowser Quantum is a free, self-hosted, web-based file manager. Prior to 1.3.1-beta and 1.2.2-stable, Stored XSS is possible via share metadata fields (e.g., title, description) that are rendered into HTML for /public/share/<hash> without context-aware escaping. The server uses text/template instead of html/template, allowing injected scripts to execute when victims visit the share URL. This vulnerability is fixed in 1.3.1-beta and 1.2.2-stable.

Affected products

• Filebrowser Filebrowser: up to and including 1.2.9; version 1.2.1 only; version 1.3.0 only

Published 2026-03-10. Last modified 2026-06-17.