SQL injection vulnerability in frontend/assets/ajax/checkusername.php in the AlphaUserPoints (com_alphauserpoints) component 1.5.2 for Joomla! allows remote attackers to execute arbitrary SQL commands via the username2points parameter.Referenceshttps://www.exploit-db.com/exploits/9654http://www.vupen.com/english/advisories/2009/2659http://www.securityfocus.com/bid/36383