Its nothing to panic over. I read some articles over it and it seems to be method through which one can only assign a new password, and its only possible if someone knows both your email id and DoB. It can't be done now because PSN on PC is down.
Also check your email if you recieved an email stating your password has been changed (there will be one because of the mandatory password change, so you should see two), then your account has been compromised. Otherwise there's nothing to worry about.







