SQL injection vulnerability in blocks/block-Old_Articles.php in Francisco Burzi PHP-Nuke 7.9 and earlier, when register_globals is enabled and magic_quotes_gpc is disabled, allows remote attackers to execute arbitrary SQL commands via the cat parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/31482
http://www.securityfocus.com/archive/1/456787/100/0/threaded
http://securitytracker.com/id?1017511
http://securityreason.com/securityalert/2153