CVE-2021-39121

Name of the Vulnerable Software and Affected Versions Atlassian Jira Server and Data Center versions prior to 8.5.18 Atlassian Jira Server and Data Center versions 8.6.0 through 8.13.10 Atlassian Jira Server and Data Center versions 8.14.0 through 8.18.2

Description The issue allows authenticated remote attackers to enumerate the keys of private Jira projects via an Information Disclosure in the "/rest/api/latest/projectvalidate/key" endpoint.

Recommendations For versions prior to 8.5.18, update to version 8.5.18 or later. For versions 8.6.0 through 8.13.10, update to version 8.13.10 or later. For versions 8.14.0 through 8.18.2, update to version 8.18.2 or later. As a temporary workaround, consider restricting access to the "/rest/api/latest/projectvalidate/key" endpoint until a patch is available.