php_api.php in phpWebNotes 2.0.0 uses the extract function to modify key variables such as $t_path_core, which leads to a PHP file inclusion vulnerability that allows remote attackers to execute arbitrary PHP code via the t_path_core parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/22040
https://euvd.enisa.europa.eu/vulnerability/EUVD-2005-2776
http://www.securitytracker.com/alerts/2005/Aug/1014807.html