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.