Skalfa Software SkaLinks Exchange Script 1.5 allows remote attackers to add new administrators and gain privileges via a direct request to admin/register.php.
https://www.exploit-db.com/exploits/6445
https://exchange.xforce.ibmcloud.com/vulnerabilities/45116
http://www.securityfocus.com/bid/31158
http://packetstormsecurity.org/0809-exploits/skalinks-editor.txt