Critical severity · published Jul 15, 2025
CVE-2025-53826
FileBrowser Has Insecure JWT Handling Which Allows Session Replay Attacks after Logout
9.8
CVSS
0.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 46% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
filebrowser · filebrowser
= 2.39.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-53826
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-53826
Issue Tracking
https://github.com/filebrowser/filebrowser/issues/5216
Exploit
https://github.com/filebrowser/filebrowser/security/advisories/GHSA-7xwp-2cpp-p8r7
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