Steams forums were hacked the other day, if you’ll recall, but it seems the forums were not the only things compromised. It seems that the hackers also managed to access a database which held a lot of regular Steam account information.
Valve have released a statement, which you can see in full below, but it does advise that if you use the Steam forums you will be required to reset your password. If you use that same password for your account then it might be an idea to change that too. The information that the hackers had access to is basically everything in your account from billing address to credit cards. Please read the statement below, and please check you bank statements closely over the next few days for suspicious activity.
Full statement below:
Our Steam forums were defaced on the evening of Sunday, November 6. We began investigating and found that the intrusion goes beyond the Steam forums.
We learned that intruders obtained access to a Steam database in addition to the forums. This database contained information including user names, hashed and salted passwords, game purchases, email addresses, billing addresses and encrypted credit card information. We do not have evidence that encrypted credit card numbers or personally identifying information were taken by the intruders, or that the protection on credit card numbers or passwords was cracked. We are still investigating.
We don’t have evidence of credit card misuse at this time. Nonetheless you should watch your credit card activity and statements closely.
While we only know of a few forum accounts that have been compromised, all forum users will be required to change their passwords the next time they login. If you have used your Steam forum password on other accounts you should change those passwords as well.
We do not know of any compromised Steam accounts, so we are not planning to force a change of Steam account passwords (which are separate from forum passwords). However, it wouldn’t be a bad idea to change that as well, especially if it is the same as your Steam forum account password.
We will reopen the forums as soon as we can.
I am truly sorry this happened, and I apologize for the inconvenience.
Source: Valve, via CVG