SQL injection vulnerability in search.php in Pre Classifieds Listings 1.0 allows remote attackers to execute arbitrary SQL commands via the category parameter.
https://www.exploit-db.com/exploits/3840
https://exchange.xforce.ibmcloud.com/vulnerabilities/34037
http://www.vupen.com/english/advisories/2007/1655
http://www.securityfocus.com/bid/52543/exploit
http://www.securityfocus.com/bid/52543