File Browser has Stored Cross-Site Scripting vulnerability
Priority HIGH 66CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- High · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.
Summary
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00334 26th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed filebrowser (filebrowser): 2.33.7github.com/filebrowser/filebrowser/v2 (Go): 2.33.7
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| filebrowser | filebrowser | before 2.33.7 | 2.33.7 | Patch available | CNA |
| — | github.com/filebrowser/filebrowser/v2 (Go) | before 2.33.7 | 2.33.7 | Patch available | GHSA-4wx8-5gm2-2j97 |
| — | github.com/filebrowser/filebrowser (Go) | up to 1.11.0 | — | No fix listed | GHSA-4wx8-5gm2-2j97 |
- filebrowser Vendorfilebrowser Affected before 2.33.7 Fixed in 2.33.7 Patch available CNA
- github.com/filebrowser/filebrowser/v2 (Go) Vendor— Affected before 2.33.7 Fixed in 2.33.7 Patch available GHSA-4wx8-5gm2-2j97
- github.com/filebrowser/filebrowser (Go) Vendor— Affected up to 1.11.0 Fixed in — No fix listed GHSA-4wx8-5gm2-2j97
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:filebrowser:filebrowser:*:*:*:*:*:*:*:* | before 2.33.7 | Vulnerable | filebrowser |
- cpe:2.3:a:filebrowser:filebrowser:*:*:*:*:*:*:*:* Versions before 2.33.7 Vulnerable ·filebrowser
Remediation
- Fix · CNA filebrowser (filebrowser) Fixed in 2.33.7
- Fix · GHSA-4wx8-5gm2-2j97 github.com/filebrowser/filebrowser/v2 (Go) Fixed in 2.33.7 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2025-52902
- 2026-10-03 Alias added: GHSA-4wx8-5gm2-2j97
References
More Filebrowser vulnerabilities
- TI-2026-25251 File Browser Self Registration Grants Any User Admin Access When Default Permissions Include Admin CVSS 4.0CRITICAL 10.0
- TI-2026-23305 File Browser: TUS Delete Endpoint Bypasses Delete Permission Check CVSS 3.1CRITICAL 9.1
- TI-2026-26777 File Browser's Signup Grants Execution Permissions When Default Permissions Includes Execution CVSS 3.1CRITICAL 9.8
- TI-2025-33000 File Browser vulnerable to command execution allowlist bypass CVSS 3.1HIGH 8.1
- TI-2026-23759 FileBrowser Quantum: Stored XSS in public share page via unsanitized share metadata (text/template misuse) CVSS 3.1HIGH 8.9
- TI-2023-20699 A cross-site scripting (XSS) vulnerability in FileBrowser before v2.23.0 allows an… CVSS 3.1CRITICAL 9.0
Sources
- CVE-2025-52902 · CVE Program
- CVE-2025-52902 · NVD
- FIRST EPSS
- GHSA-4wx8-5gm2-2j97 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences