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High7.5Atlassian

High [CVE-2021-39123] Affected versions of Atlassian Jira Server and Data Center

This high-severity Atlassian advisory covers CVE-2021-39123 affecting Jira.

CVE-2021-39123 Published Sep 14, 2021Updated by vendor Jun 17, 2026
Affected products & platforms
AtlassianJira
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Summary

Affected versions of Atlassian Jira Server and Data Center allow unauthenticated remote attackers to impact the application's availability via a Denial of Service (DoS) vulnerability in the /rest/gadget/1.0/createdVsResolved/generate endpoint. The affected versions are before version 8.16.0.

Affected versions
  • 8.16.0

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions
  • 8.16.0

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation

Upgrade to a fixed release: 8.16.0. That is the remediation for this advisory.

The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

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