CVE-2026-30934
FileBrowser Quantum: Stored XSS in public share page via unsanitized share metadata (text/template misuse)
MEDIUM 5.4EPSS 0.4%
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
- gtsteffaniak · filebrowser
- CVSS v3.1 NVD
- 5.4 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - CVSS v3.1 GITHUB
- 8.9 HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L - EPSS
- 0.38% chance of exploitation in the next 30 days, 30th percentile
- Published
- 2026-03-10
Proof-of-concept exploits (1)
Security advisories
- gtsteffaniak/filebrowser/security/advisories/GHSA-r633-fcgp-m532
- gtsteffaniak/filebrowser/releases/tag/v1.3.1-beta