What is CVE-2025-52902?

CVE-2025-52902 is a high-severity vulnerability in Filebrowser, classified under Cross-site Scripting. CVSS score: 7.6/10. Published 2025-06-26.

How severe is CVE-2025-52902?

High severity. CVSS v3 base score is 7.6 out of 10.

XSS in Filebrowser

CVE-2025-52902

File Browser provides a file managing interface within a specified directory and it can be used to upload, delete, preview, rename and edit files. The Markdown preview function of File Browser prior to v2.33.7 is vulnerable to Stored Cross-Site-Scripting (XSS). Any JavaScript code that is part of a Markdown file uploaded by a user will be executed by the browser. Version 2.33.7 contains a fix for the issue.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2025-06-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (23.3th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 23.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.001

Affected products

Filebrowser — versions < 2.33.7

Weakness classification (CWE)

References

github.com/filebrowser/filebrowser/security/advisories/GHSA-4wx8-5gm2-2j97 (Exploit, Vendor Advisory)
github.com/filebrowser/filebrowser/commit/f19943a42e8e092e811dffbe9f4623dac36f1… (Patch)

Frequently asked questions

What is CVE-2025-52902?: CVE-2025-52902 is a high-severity vulnerability in Filebrowser, classified under Cross-site Scripting. CVSS score: 7.6/10. Published 2025-06-26.
How severe is CVE-2025-52902?: High severity. CVSS v3 base score is 7.6 out of 10.