What’s Vulnerable › Vulnerabilities

CVE-2026-25889: File Browser has an Authentication Bypass in User Password Update

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-02-09 · updated 2026-06-17
• Weakness: CWE-178

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. Prior to 2.57.1, a case-sensitivity flaw in the password validation logic allows any authenticated user to change their password (or an admin to change any user's password) without providing the current password. By using Title Case field name "Password" instead of lowercase "password" in the API request, the current_password verification is completely bypassed. This enables account takeover if an attacker obtains a valid JWT token through XSS, session hijacking, or other means. This vulnerability is fixed in 2.57.1.

Affected products

• filebrowser: before 2.57.1 — fixed in 2.57.1

How to fix

Upgrade to a fixed version: filebrowser 2.57.1. Check the vendor advisory for mitigations.

References

• https://github.com/filebrowser/filebrowser/commit/ff2f00498cff151e2fb1f5f0b16963bf33c3d6d4
• https://github.com/filebrowser/filebrowser/releases/tag/v2.57.1
• https://github.com/filebrowser/filebrowser/security/advisories/GHSA-hxw8-4h9j-hq2r

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