This exploit allows an attacker to inject malicious SQL code into the vulnerable application. The malicious code is then executed by the application, allowing the attacker to gain access to sensitive data such as usernames and passwords. The vulnerable application in this case is the Joomla component "Videos" which is vulnerable to SQL injection. The exploit is triggered by sending a specially crafted HTTP request to the vulnerable application. The request contains a malicious SQL statement which is then executed by the application.