The Users Ultra WordPress plugin through 3.1.0 fails to properly sanitize and escape the data_target parameter before it is being interpolated in an SQL statement and then executed via the rating_vote AJAX action (available to both unauthenticated and authenticated users), leading to an SQL Injection.
Multiple SQL injection vulnerabilities in the ratings module in the Users Ultra plugin before 1.5.16 for WordPress allow remote attackers to execute arbitrary SQL commands via the (1) data_target or (2) data_vote parameter in a rating_vote (wp_ajax_nopriv_rating_vote) action to wp-admin/admin-ajax.php.