What is CVE-2026-30934?

CVE-2026-30934 is a high-severity vulnerability in Gtsteffaniak Filebrowser, classified under Cross-site Scripting. CVSS score: 8.9/10. Published 2026-03-10.

How severe is CVE-2026-30934?

High severity. CVSS v3 base score is 8.9 out of 10.

XSS in Gtsteffaniak Filebrowser

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> with…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (13.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.9 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L.

Affected products

Gtsteffaniak Filebrowser — versions >= 1.3.0-beta, < 1.3.1-beta, < 1.2.2-stable

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

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

Frequently asked questions

What is CVE-2026-30934?: CVE-2026-30934 is a high-severity vulnerability in Gtsteffaniak Filebrowser, classified under Cross-site Scripting. CVSS score: 8.9/10. Published 2026-03-10.
How severe is CVE-2026-30934?: High severity. CVSS v3 base score is 8.9 out of 10.