What’s Vulnerable › Vulnerabilities

CVE-2025-52902: File Browser has Stored Cross-Site Scripting vulnerability

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-06-26 · updated 2026-06-17
• Weakness: CWE-79

Description

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.

Affected products

• filebrowser: before 2.33.7 — fixed in 2.33.7

How to fix

Upgrade to a fixed version: filebrowser 2.33.7. Check the vendor advisory for mitigations.

References

• https://github.com/filebrowser/filebrowser/commit/f19943a42e8e092e811dffbe9f4623dac36f1f0d
• https://github.com/filebrowser/filebrowser/security/advisories/GHSA-4wx8-5gm2-2j97

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