What is CVE-2020-28249?

CVE-2020-28249 is a medium-severity vulnerability in Joplin Project, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-11-06.

How severe is CVE-2020-28249?

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

XSS in Joplin Project

CVE-2020-28249

Joplin 1.2.6 for Desktop allows XSS via a LINK element in a note.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-11-06 · 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: 0.031 (87.0th percentile), scored 2026-09-23.

Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.031 · newest: 0.031 · change: 0.000

Affected products

Joplin Project — versions 1.2.6

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/laurent22/joplin/releases (Third Party Advisory)
github.com/fhlip0/JopinXSS (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-28249?: CVE-2020-28249 is a medium-severity vulnerability in Joplin Project, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-11-06.
How severe is CVE-2020-28249?: Medium severity. CVSS v3 base score is 6.1 out of 10.