As a newbie, I always login to check if my forum account is still intact. I want to know if it's possible for my account to be hacked.
Yes, it is. As said, the easiest is phishing sites impersonating bitcointalk.
A very important part is to learn how to have your own local bitcoin wallet, how to sign a message with an address of your wallet (you can search for tutorials on bitcointalk), then
stake your address. This will help you recover your account if it's hacked.