What is CVE-2021-37916?

CVE-2021-37916 is a medium-severity vulnerability in Joplin Project, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-08-03.

How severe is CVE-2021-37916?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Joplin Project

CVE-2021-37916

Joplin before 2.0.9 allows XSS via button and form in the note body.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-08-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.007 (52.9th percentile), scored 2026-09-23.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Joplin Project

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/laurent22/joplin/commit/feaecf765368f2c273bea3a9fa641ff0da7e6b26 (Patch, Third Party Advisory)
github.com/laurent22/joplin/releases/tag/v2.0.9 (Third Party Advisory, Release Notes)

Frequently asked questions

What is CVE-2021-37916?: CVE-2021-37916 is a medium-severity vulnerability in Joplin Project, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-08-03.
How severe is CVE-2021-37916?: Medium severity. CVSS v3 base score is 6.1 out of 10.