SQL injection vulnerability in the DT Register (com_dtregister) 2.2.3 component for Joomla! allows remote attackers to execute arbitrary SQL commands via the eventId parameter in a pay_options action to index.php.
https://www.exploit-db.com/exploits/6086
https://exchange.xforce.ibmcloud.com/vulnerabilities/43851
http://www.dthdevelopment.com/index.php?option=com_fireboard&Itemid=73&func=view&id=1883&catid=4
http://securityreason.com/securityalert/4023