Final answer:
The user was likely the victim of a phishing attack, where they were tricked into giving out their personal information through a phishing email or link.
Step-by-step explanation:
The user was likely the victim of a phishing attack. Phishing is a method used by hackers to trick people into giving out their personal information by posing as a trustworthy entity, such as a bank or an email service. This is often done through email or instant messaging, where the attacker sends a message with a fake link that directs the user to a fraudulent website. When the user fills in their information on this website, it is captured by the attacker and can be used for unauthorized transactions.