Multiple SQL injection vulnerabilities in Null news allow remote attackers to execute arbitrary SQL commands via (1) the user_email parameter in (a) lostpass.php, and the (2) user_email and (3) user_username parameters in (b) sub.php and (c) unsub.php.
https://exchange.xforce.ibmcloud.com/vulnerabilities/25502
http://www.vupen.com/english/advisories/2006/1151
http://www.securityfocus.com/bid/17300
http://www.securityfocus.com/archive/1/430298/100/0/threaded
http://securityreason.com/securityalert/682