Affected versions of Atlassian Jira Server and Data Center allow remote attackers to impact the application's availability via a Regex-based Denial of Service (DoS) vulnerability in JQL version searching.

Affected versions:

• version < 7.13.16
• 8.0.0 ≤ version < 8.5.7
• 8.6.0 ≤ version < 8.10.2
• 8.11.0 ≤ version < 8.11.1

Fixed versions:

• 7.13.16
• 8.5.7
• 8.10.2
• 8.11.1
• 8.12.0