The codection "Import users from CSV with meta" plugin before 1.14.2.2 for WordPress allows wp-admin/admin-ajax.php?action=acui_delete_attachment CSRF.
https://wpvulndb.com/vulnerabilities/9392
https://wordpress.org/plugins/import-users-from-csv-with-meta/#developers
https://plugins.trac.wordpress.org/browser/import-users-from-csv-with-meta?rev=2112013