What is CVE-2025-25187?

CVE-2025-25187 is a high-severity vulnerability in Joplin Project, classified under Cross-site Scripting. CVSS score: 7.8/10. Published 2025-02-07.

How severe is CVE-2025-25187?

High severity. CVSS v3 base score is 7.8 out of 10.

XSS in Joplin Project

CVE-2025-25187

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 adding note titles to the document using React's `dangerouslySetInnerHTML`, without first escaping HTML entities. Joplin lacks a Content-Security-Policy with a restrictive `script-src`. This allows arbitrary JavaScript execution via inline `onclick`/`onload` event handlers in unsanitized HTML. Additionally, Joplin's main window is created with `nodeIntegration` set to `true`, allowing arbitrary JavaScript execution to result in arbitrary code execution. Anyone who 1) receives notes from unknown sources and 2) uses <kbd>ctrl</kbd>-<kbd>p</kbd> to search is impacted. This issue has been addressed in version 3.1.24 and all users are advised to upgrade. There are no known workarounds for this vulnerability.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2025-02-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (41.3th percentile), scored 2026-11-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 41.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Joplin Project
Laurent22 Joplin — versions < 3.1.24

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/laurent22/joplin/security/advisories/GHSA-9gfv-q6wj-fr3c (Exploit, Vendor Advisory)
github.com/laurent22/joplin/commit/360ece6f8873ef81afbfb98b25faad696ffccdb6 (Patch)
developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/scrip… (Product)
github.com/laurent22/joplin/blob/2fc9bd476b0d9abcddb0a46f615a48333779d225/packa… (Product)

Frequently asked questions

What is CVE-2025-25187?: CVE-2025-25187 is a high-severity vulnerability in Joplin Project, classified under Cross-site Scripting. CVSS score: 7.8/10. Published 2025-02-07.
How severe is CVE-2025-25187?: High severity. CVSS v3 base score is 7.8 out of 10.