SQL injection vulnerability in index.php in Realtor 747 allows remote attackers to execute arbitrary SQL commands via the categoryid parameter.
https://www.exploit-db.com/exploits/4184
https://exchange.xforce.ibmcloud.com/vulnerabilities/35420
http://www.vupen.com/english/advisories/2007/2541
http://www.securityfocus.com/bid/24916