CVE-2019-20899: Atlassian Jira

Medium severity, CVSS 5.3. EPSS: 2.1% chance of exploitation in the next 30 days.

The Gadget API in Atlassian Jira Server and Data Center in affected versions allows remote attackers to make Jira unresponsive via repeated requests to a certain endpoint in the Gadget API. The affected versions are before version 8.5.4, and from version 8.6.0 before 8.6.1.

Affected products

• Atlassian Jira: before 8.5.4 (fixed in 8.5.4)
• Atlassian Jira Data Center: from 8.5.5, before 8.6.1 (fixed in 8.6.1); from 8.6.2, before 8.7.0 (fixed in 8.7.0)
• Atlassian Jira Server: from 8.5.5, before 8.6.1 (fixed in 8.6.1); from 8.6.2, before 8.7.0 (fixed in 8.7.0)
• Atlassian Jira Software Data Center: before 8.5.4 (fixed in 8.5.4)

Published 2020-07-13. Last modified 2026-06-17.