To get an indication how bad this is, the default Steam account page was showing other people's accounts.
EDIT: Steam fully down for now. If you had a Steam Account, I recommend checking email/credit card on any linked accounts. (and, as always, sign up for 2FA if you haven't!)
EDIT2: Steam Community Moderator response (not linked):
- No, Steam is not hacked
- Creditcard info and phone numbers are, as required by law, censored and not visible to users
To get an indication how bad this is, the default Steam account page was showing other people's accounts.
EDIT: Steam fully down for now. If you had a Steam Account, I recommend checking email/credit card on any linked accounts. (and, as always, sign up for 2FA if you haven't!)
EDIT2: Steam Community Moderator response (not linked):
- No, Steam is not hacked
- Creditcard info and phone numbers are, as required by law, censored and not visible to users