XSS in Filebrowser
CVE-2026-34530
File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to version 2.62.2, the SPA index page in File Browser is vulnerable to Stored Cross-Site Scripting (XSS) via admin-controlled branding fields. An admin who sets branding.name to a malicious payload injects persistent JavaScript that executes for ALL visitors, including unauthenticated users. This issue has been patched in version 2.62.2.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (26.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 26.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Filebrowser — versions < 2.62.2
Weakness classification (CWE)
References
- github.com/filebrowser/filebrowser/security/advisories/GHSA-xfqj-3vmx-63wv (Exploit, Vendor Advisory)
- github.com/filebrowser/filebrowser/releases/tag/v2.62.2 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-34530?
- CVE-2026-34530 is a medium-severity vulnerability in Filebrowser, classified under Cross-site Scripting. CVSS score: 6.9/10. Published 2026-04-01.
- How severe is CVE-2026-34530?
- Medium severity. CVSS v3 base score is 6.9 out of 10.