Description
Joplin is an open source note-taking and to-do application that organises notes and lists into notebooks. Versions prior to 3.5.7 contain a path traversal vulnerability in the importer which allows overwriting arbitrary files on disk. The OneNote converter does not sanitize the names of embedded files before writing them to disk. As a result, it's possible for an attacker to create a malicious .one file that includes file names containing ../../, that are then interpreted as part of the target path when extracting attachments from the .one file. This issue has been patched in version 3.5.7.
Affected products
joplinapp: joplin; msiemens: one2html
References6
- github.com/laurent22/joplin/security/advisories/GHSA-gcmj-c9gg-… Vendor Advisory
- github.com/laurent22/joplin/security/advisories/GHSA-gcmj-c9gg-… Vendor Advisory
- github.com/laurent22/joplin/commit/791668455e1aae50501ff57ea478… Patch
- github.com/laurent22/joplin/releases/tag/v3.5.7 PatchProduct
- github.com/laurent22/joplin/blob/af5108d70233b1db9410346958c158… Product
- github.com/laurent22/joplin/pull/13736 Issue Tracking
Metrics
- CVSS 3.1
-
7.3
HIGH
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 11 · as of 14 November 2026
- CWE
- CWE-24
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.