Social Engineering is the art of obtaining confidential information through the manipulation of the people with this knowledge. This technique is based on the fact that human beings represent the weakest link in a secure system, as somebody usually knows how to access it. The idea being that it is easier to manipulate a person than the system itself. Online banking is no exception. In this case, the most vulnerable people are the users themselves, the end clients of the banks, and the objective is to access their accounts. Cybercriminals use Social Engineering through HTML Injections to cheat on users and obtain their credentials. In this presentation a demo was performed to detect HTML Injections in web browsers.