SQL injection vulnerability in chat.php in MWChat 6.8 allows remote attackers to execute arbitrary SQL commands via the username parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/22845
http://www.vupen.com/english/advisories/2005/2180
http://www.securityfocus.com/bid/15198
http://www.hackerscenter.com/Archive/view.asp?id=19537
http://secunia.com/advisories/17303
http://appindex.net/products/changelog/?product=mwchat&version=6.9