What is the probable cause of this attack placed on the web form?

One of your web design clients contacts you to report that a visitor on their site submitted a form. A malicious web site then opened in a new window and launched malware on the visitor’s computer.

What is the probable cause of this attack placed on the web form?
A . Failure to sanitize input fields
B . Failure to validate input fields
C . Failure to include CAPTCHA
D . Failure to encrypt post data

View Answer

Answer: A