CVE-2026-30934

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.

Score

CVSS 3.1 8.9 High

Status

Analyzed - security-advisories@github.com

Published

2026-03-10

Last modified

2026-03-10

Weaknesses

CWE-79

Affected products

• Filebrowser (Filebrowser)
• Filebrowser (Gtsteffaniak)

References

• https://github.com/gtsteffaniak/filebrowser/releases/tag/v1.2.2-stable
• https://github.com/gtsteffaniak/filebrowser/releases/tag/v1.3.1-beta
• https://github.com/gtsteffaniak/filebrowser/security/advisories/GHSA-r633-fcgp-m532