CVE-2026-30934

Name: CVE-2026-30934
Creator: NVD / NIST
Published: 2026-03-10T18:18:53.257+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.35%

Last modified Jun 17, 2026

CVE-2026-30934 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. 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. EPSS estimates a 0.35% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

0.35%

26.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions	Update
Filebrowser	Filebrowser	<= 1.2.9	—
Filebrowser	Filebrowser	1.2.1	Stable
Filebrowser	Filebrowser	1.3.0	Beta

References

https://github.com/gtsteffaniak/filebrowser/releases/tag/v1.2.2-stableRelease Notes
https://github.com/gtsteffaniak/filebrowser/releases/tag/v1.3.1-betaRelease Notes
https://github.com/gtsteffaniak/filebrowser/security/advisories/GHSA-r633-fcgp-m532Exploit, Vendor Advisory

Timeline

Published: Mar 10, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-30934?

How severe is CVE-2026-30934?

CVE-2026-30934 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.35% probability of exploitation in the next 30 days.

How do I fix CVE-2026-30934?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-30934?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST