The Events Manager plugin 5.9.4 for WordPress has XSS via the dbem_event_reapproved_email_body parameter to the wp-admin/edit.php?post_type=event&page=events-manager-options URI.
https://wpvulndb.com/vulnerabilities/9612
https://wordpress.org/plugins/events-manager/#developers
https://gist.github.com/ansarisec/12737c207c0851d52865ed60c08891b7
https://ansawaf.blogspot.com/2019/04/cve-2018-13137-xss-in-events-manager.html