Ni WooCommerce Custom Order Status <= 1.9.6 is vulnerable to SQL Injection (SQLi) vulnerability

The get_query() function of the Ni WooCommerce Custom Order Status WordPress plugin before 1.9.7, used by the niwoocos_ajax AJAX action, available to all authenticated users, does not properly sanitise the sort parameter before using it in a SQL statement, leading to an SQL injection, exploitable by any authenticated users, such as subscriber