WP Review Slider Pro <= 12.6.8 - Authenticated (Subscriber+) SQL Injection via 'curselrevs' Parameter

The WP Review Slider Pro plugin for WordPress is vulnerable to SQL Injection via the 'curselrevs[]' parameter of the wpfb_find_reviews AJAX action in versions up to, and including, 12.6.8. This is due to the handler reading $_POST['curselrevs'] raw with no sanitization or type casting, then concatenating each array element directly into a `WHERE id IN ( ... )` clause without quoting and executing via $wpdb->get_results() without $wpdb->prepare(). This makes it possible for authenticated attackers, with Subscriber-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.