CVE-2025-27409: joplin Path Traversal

Description

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.

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CVSS v3.1 Score

7.5

HIGH

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

Weakness Type (CWE)

CWE-22 Path Traversal

Affected Products

Vendor	Product	Versions
joplin_project	joplin	< 3.3.3

References

Advisories & Patches

https://github.com/laurent22/joplin/pull/11916 https://github.com/laurent22/joplin/security/advisories/GHSA-5xv6-7jm3-fmg5 https://github.com/laurent22/joplin/security/advisories/GHSA-5xv6-7jm3-fmg5

Exploits

https://github.com/laurent22/joplin/security/advisories/GHSA-5xv6-7jm3-fmg5 https://github.com/laurent22/joplin/security/advisories/GHSA-5xv6-7jm3-fmg5

Frequently Asked Questions

What is CVE-2025-27409? +

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. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-27409? +

CVE-2025-27409 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-27409? +

CVE-2025-27409 affects products from joplin_project, specifically: joplin. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-27409? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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