Multiple cross-site scripting (XSS) vulnerabilities in the Events Manager plugin before 5.3.5 and Events Manager Pro plugin before 2.2.9 for WordPress allow remote attackers to inject arbitrary web script or HTML via the (1) scope parameter to index.php; (2) user_name, (3) dbem_phone, (4) user_email, or (5) booking_comment parameter to an event with registration enabled; or the (6) _wpnonce parameter to wp-admin/edit.php.