SQL injection vulnerability in index.php in Francisco Burzi PHP-Nuke 8.0 Final and earlier, when the "HTTP Referers" block is enabled, allows remote attackers to execute arbitrary SQL commands via the HTTP Referer header (HTTP_REFERER variable).
https://www.exploit-db.com/exploits/3346
https://exchange.xforce.ibmcloud.com/vulnerabilities/32607
http://www.vupen.com/english/advisories/2007/0673
http://www.securityfocus.com/bid/22638
http://www.securityfocus.com/archive/1/461148/100/0/threaded
http://secunia.com/advisories/24224
http://lists.grok.org.uk/pipermail/full-disclosure/2007-February/052570.html