Vulnerability in Filebrowser
CVE-2026-25889
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (32.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 32.8% 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: 0.004 · change: +0.001
Affected products
- Filebrowser — versions < 2.57.1
Weakness classification (CWE)
References
- github.com/filebrowser/filebrowser/security/advisories/GHSA-hxw8-4h9j-hq2r (Exploit, Mitigation, Vendor Advisory)
- github.com/filebrowser/filebrowser/commit/ff2f00498cff151e2fb1f5f0b16963bf33c3d… (Patch)
- github.com/filebrowser/filebrowser/releases/tag/v2.57.1 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-25889?
- CVE-2026-25889 is a medium-severity vulnerability in Filebrowser, classified under Improper Handling of Case Sensitivity. CVSS score: 5.4/10. Published 2026-02-09.
- How severe is CVE-2026-25889?
- Medium severity. CVSS v3 base score is 5.4 out of 10.