SQL injection vulnerability in FlexCustomer 0.0.4 and earlier allows remote attackers to bypass authentication and execute arbitrary SQL commands via the admin and ordinary user interface, probably involving the (1) checkuser and (2) checkpass parameters to (a) admin/index.php, and (3) username and (4) password parameters to (b) index.php. NOTE: it was later reported that 0.0.6 is also affected.
https://www.exploit-db.com/exploits/7622
https://exchange.xforce.ibmcloud.com/vulnerabilities/47651
https://exchange.xforce.ibmcloud.com/vulnerabilities/26323
http://www.vupen.com/english/advisories/2006/1690
http://www.securityfocus.com/bid/17864
http://www.securityfocus.com/archive/1/433125/100/0/threaded