What is CVE-2021-43945?

CVE-2021-43945 is a medium-severity vulnerability in Atlassian Data Center, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2022-02-28.

How severe is CVE-2021-43945?

Medium severity. CVSS v3 base score is 4.8 out of 10.

XSS in Atlassian Data Center

CVE-2021-43945

Affected versions of Atlassian Jira Server and Data Center allow remote attackers with Roadmaps Administrator permissions to inject arbitrary HTML or JavaScript via a Stored Cross-Site Scripting (SXSS) vulnerability in the /rest/jpo/1.0/hierarchyConfiguration endpoint. The affected versions are before version 8.20.3.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2022-02-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (45.3th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 45.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Atlassian Data Center
Atlassian Jira
Atlassian Jira Data Center — versions unspecified
Atlassian Jira Server — versions unspecified

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

jira.atlassian.com/browse/JRASERVER-73069 (Vendor Advisory)

Frequently asked questions

What is CVE-2021-43945?: CVE-2021-43945 is a medium-severity vulnerability in Atlassian Data Center, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2022-02-28.
How severe is CVE-2021-43945?: Medium severity. CVSS v3 base score is 4.8 out of 10.