CVE-2021-39124: Atlassian Data Center

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

The Cross-Site Request Forgery (CSRF) failure retry feature of Atlassian Jira Server and Data Center before version 8.16.0 allows remote attackers who are able to trick a user into retrying a request to bypass CSRF protection and replay a crafted request.

Affected products

• Atlassian Data Center: before 8.16.0 (fixed in 8.16.0)
• Atlassian Jira: before 8.16.0 (fixed in 8.16.0)

Published 2021-09-14. Last modified 2026-06-17.