CVE-2021-43953: Atlassian Data Center

Medium severity, CVSS 4.3. EPSS: 0.5% chance of exploitation in the next 30 days.

Affected versions of Atlassian Jira Server and Data Center allow unauthenticated remote attackers to toggle the Thread Contention and CPU monitoring settings via a Cross-Site Request Forgery (CSRF) vulnerability in the /secure/admin/ViewInstrumentation.jspa endpoint. The affected versions are before version 8.13.16, and from version 8.14.0 before 8.20.5.

Affected products

• Atlassian Data Center: before 8.13.16 (fixed in 8.13.16); from 8.14.0, before 8.20.5 (fixed in 8.20.5)
• Atlassian Jira: before 8.13.16 (fixed in 8.13.16); from 8.14.0, before 8.20.5 (fixed in 8.20.5)

Published 2022-02-15. Last modified 2026-06-17.