CVE-2021-39118: Atlassian Data Center

Medium severity, CVSS 5.3. EPSS: 1.4% chance of exploitation in the next 30 days.

Affected versions of Atlassian Jira Server and Data Center allow remote attackers to discover the usernames and full names of users via an enumeration vulnerability in the /rest/api/1.0/render endpoint. The affected versions are before version 8.19.0.

Affected products

• Atlassian Data Center: before 8.19.0 (fixed in 8.19.0)
• Atlassian Jira: before 8.19.0 (fixed in 8.19.0)

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