FileBrowser Has Insecure JWT Handling Which Allows Session Replay Attacks after Logout
Priority HIGH 73CWE-305Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass, Spoofing
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-613 and CWE-384.
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. In version 2.39.0, File Browser’s authentication system issues long-lived JWT tokens that remain valid even after the user logs out. As of time of publication, no known patches exist.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00552 46th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- 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 | = 2.39.0 | — | No fix listed | CNA |
| — | github.com/filebrowser/filebrowser (Go) | up to 2.39.0 | — | No fix listed | GHSA-7xwp-2cpp-p8r7 |
| — | github.com/filebrowser/filebrowser/v2 (Go) | up to 2.39.0 | — | No fix listed | GHSA-7xwp-2cpp-p8r7 |
- filebrowser Vendorfilebrowser Affected = 2.39.0 Fixed in — No fix listed CNA
- github.com/filebrowser/filebrowser (Go) Vendor— Affected up to 2.39.0 Fixed in — No fix listed GHSA-7xwp-2cpp-p8r7
- github.com/filebrowser/filebrowser/v2 (Go) Vendor— Affected up to 2.39.0 Fixed in — No fix listed GHSA-7xwp-2cpp-p8r7
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:filebrowser:filebrowser:2.39.0:*:*:*:*:*:*:* | 2.39.0 | Vulnerable | filebrowser |
- cpe:2.3:a:filebrowser:filebrowser:2.39.0:*:*:*:*:*:*:* Versions 2.39.0 Vulnerable ·filebrowser
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-53826
- 2026-10-03 Alias added: GHSA-7xwp-2cpp-p8r7
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-2025-53826 · CVE Program
- CVE-2025-53826 · NVD
- FIRST EPSS
- GHSA-7xwp-2cpp-p8r7 · 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