CVE-2021-43943

Name of the Vulnerable Software and Affected Versions Atlassian Jira Service Management Server and Data Center versions prior to 4.21.0

Description The issue allows attackers with administrator privileges to inject arbitrary HTML or JavaScript via a Cross-Site Scripting (XSS) vulnerability in the Object Schema field of "/secure/admin/InsightDefaultCustomFieldConfig.jspa".

Recommendations For versions prior to 4.21.0, update to version 4.21.0 or later to resolve the issue. As a temporary workaround, consider restricting access to the "/secure/admin/InsightDefaultCustomFieldConfig.jspa" endpoint to minimize the risk of exploitation.