There is a SQL Injection vulnerability in PHP-Nuke 8.3.3 in the User Registration section, leading to remote code execution. This occurs because the U.S. state is not validated to be two letters, and the OrderBy field is not validated to be one of LASTNAME, CITY, or STATE.

SQL injection vulnerability in the Submit_News module for PHP-Nuke 8.3 allows remote attackers to execute arbitrary SQL commands via the topics[] parameter to modules.php.