jira-importers-plugin has misconfigured XSRF protection - CVE-2021-43941

Affected versions of Atlassian Jira Server and Data Center allow remote attackers to modify several resources (including CsvFieldMappingsPage.jspa and ImporterValueMappingsPage.jspa) via a Cross-Site Request Forgery (CSRF) vulnerability in the jira-importers-plugin.

The affected versions are before version 8.13.15, and from version 8.14.0 before 8.20.3.

Affected versions:

• version < 8.13.15
• 8.14.0 ≤ version < 8.20.3

Fixed versions:

• 8.13.15
• 8.20.3
• 8.21.0