XSS in Atlassian Jira Data Center

CVE-2021-43942

Affected versions of Atlassian Jira Server and Data Center allow remote attackers to inject arbitrary HTML or JavaScript via a Reflected Cross-Site Scripting (XSS) vulnerability in the /rest/collectors/1.0/template/custom endpoint. To exploit this issue, the attacker must trick a user into visiting a malicious website. The affected versions are before version 8.13.15, and from version 8.14.0 before 8.20.3.

Vulnerability class: XSS (Cross-Site Scripting)

Published · last modified .

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: 0.554 (99.0th percentile), scored .

High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2021-43942: held from 0.554 to 0.554.

EPSS over last 30 days · oldest: 0.554 · newest: 0.554 · change: 0.000

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2021-43942?
CVE-2021-43942 is a medium-severity vulnerability in Atlassian Jira Data Center, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2022-01-04.
How severe is CVE-2021-43942?
Medium severity. CVSS v3 base score is 6.1 out of 10.