CVE-2025-53826

FileBrowser Has Insecure JWT Handling Which Allows Session Replay Attacks after Logout

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.

Affected

filebrowser

CVSS v4.0 GITHUB

7.7 HIGHCVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v4.0 GitHub

7.7 HIGHCVSS: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

CVSS v3.1 NVD

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.55% chance of exploitation in the next 30 days, 45th percentile

Published

2025-07-15

Proof-of-concept exploits (2)

• filebrowser/filebrowser/security/advisories/GHSA-7xwp-2cpp-p8r7
• advisories/GHSA-7xwp-2cpp-p8r7

Security advisories

• filebrowser/filebrowser/issues/5216

References

• CVE Record
• NVD entry