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.
Improper Neutralization of Special Elements used in an SQL Command The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.