A concern was raised about a potential exploit using Steam's OpenID login system that could spoof account credentials and login to third-party sites erroneously. We cannot confirm that our OpenID handler is even affected. Until we know more details, as a safety precaution, Steam logins have been disabled on the SCG site.
There has not been any sign of fraudulent activity or logins. Additionally, if someone were to login to an elevated account, there is no personal data that can be accessed via our onsite administration panel. The only thing of concern would be people messing around with our ban database.