CVE-2026-30934 HIGH

CVE-2026-30934: FileBrowser Quantum: Stored XSS in public share page via unsanitized share metadata (text/template misuse)

Vendor Gtsteffaniak
Product filebrowser
Weakness CWE-79 · XSS
Published March 10, 2026
Last update March 10, 2026
View on NVD All CVEs

CVSS base score

8.9/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction Required
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 10, 2026 CVE published
March 10, 2026 Record updated