CVE-2021-39128: Atlassian Jira Data Center

High severity, CVSS 7.2. EPSS: 1.9% chance of exploitation in the next 30 days.

Affected versions of Atlassian Jira Server or Data Center using the Jira Service Management addon allow remote attackers with JIRA Administrators access to execute arbitrary Java code via a server-side template injection vulnerability in the Email Template feature. The affected versions of Jira Server or Data Center are before version 8.13.12, and from version 8.14.0 before 8.19.1.

Affected products

• Atlassian Jira Data Center: before 8.13.12 (fixed in 8.13.12); from 8.14.0, before 8.19.1 (fixed in 8.19.1)
• Atlassian Jira Server: before 8.13.12 (fixed in 8.13.12); from 8.14.0, before 8.19.1 (fixed in 8.19.1)

Published 2021-09-16. Last modified 2026-06-17.