CVE-2021-43943: [JSDSERVER-10980] Stored XSS in "Object Schema" field of /secure/admin/InsightDefaultCustomFieldConfig.jspa - CVE-2021-43943

Affected versions of Atlassian Jira Service Management Server and Data Center allow 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.

The affected versions are before version 4.21.0.

Affected versions:

• version < 4.21.0

Fixed versions:

• 4.21.0