CVE-2025-27409: Joplin Project Joplin

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. Prior to version 3.3.3, path traversal is possible in Joplin Server if static file path starts with `css/pluginAssets` or `js/pluginAssets`. The `findLocalFile` function in the `default route` calls `localFileFromUrl` to check for special `pluginAssets` paths. If the function returns a path, the result is returned directly, without checking for path traversal. The vulnerability allows attackers to read files outside the intended directories. This issue has been patched in version 3.3.3.

Affected products

• Joplin Project Joplin: before 3.3.3 (fixed in 3.3.3)

Published 2025-04-30. Last modified 2026-06-17.