Path traversal in Joplin Server - CVE-2025-27409
Published: April 30, 2025 / Updated: May 26, 2026
Vulnerability identifier: #VU132297
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-27409
CWE-ID: CWE-22
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to path traversal in the findLocalFile function in the default route when handling static file paths beginning with css/pluginAssets or js/pluginAssets. A remote attacker can send a specially crafted request to disclose sensitive information.
The issue can be exploited to read files outside the intended directories.
Affected software
Joplin Server
How to mitigate CVE-2025-27409
Install security update from vendor's website.
Joplin Server - update to 3.3.4