CVE-2025-24028

moderate-risk
Published 2025-02-07

Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. This vulnerability is caused by differences between how Joplin's HTML sanitizer handles comments and how the browser handles comments. This affects both the Rich Text Editor and the Markdown viewer. However, unlike the Rich Text Editor, the Markdown viewer is `cross-origin isolated`, which prevents JavaScript from directly accessing functions/variables in the toplevel Joplin `window`. This issue is not present in Joplin 3.1.24 and may have been introduced in `9b50539`. This is an XSS vulnerability that impacts users that open untrusted notes in the Rich Text Editor. This vulnerability has been addressed in version 3.2.12 and all users are advised to upgrade. There are no known workarounds for this vulnerability.

Do I need to act?

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0.34% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.8/10 High
LOCAL / LOW complexity

Affected Products (1)

Affected Vendors

Joplin Project

References (5)

Patch https://github.com/laurent22/joplin/commit/2a058ed8097c2502e152b26394dc1917897f5...
Patch https://github.com/laurent22/joplin/commit/9b505395918bc923f34fe6f3b960bb10e8cf2...
Exploit https://github.com/laurent22/joplin/security/advisories/GHSA-5w3c-wph9-hq92
Product https://joplinapp.org/help/dev/spec/note_viewer_isolation
Exploit https://github.com/laurent22/joplin/security/advisories/GHSA-5w3c-wph9-hq92
30
/ 100
moderate-risk
Severity 24/34 · High
Exploitability 1/34 · Minimal
Exposure 5/34 · Minimal