Multiple SQL injection vulnerabilities in Qsoft K-Links allow remote attackers to execute arbitrary SQL commands via (1) the id parameter to visit.php, or the PATH_INFO to the default URI under (2) report/, (3) addreview/, or (4) refer/.
https://www.exploit-db.com/exploits/6192
https://exchange.xforce.ibmcloud.com/vulnerabilities/44219
https://exchange.xforce.ibmcloud.com/vulnerabilities/44160
http://www.securityfocus.com/bid/30520