Square Enix is reporting today that their Members service site has been accessed by unauthorized users. The full extent to what the intruders gained access to has not yet been released, however Square Enix has confirmed that no credit card data was involved.
The compromise effects both North America and Japanese members and while Square Enix continues the investigation, all members services will be temporarily shutdown for a few days.
We have reason to believe that unknown parties may have gained unauthorized access to a particular Square Enix server related to the free SQUARE ENIX MEMBERS service offered in North America and Japan. In response, Square Enix, Inc. has temporarily suspended operation of the SQUARE ENIX MEMBERS service starting at 10PM (PST) on December 12, 2011.
We are assessing the full extent of this potential breach to determine what data, if any, was compromised and will provide more details as soon as possible. While some personal information may have been accessed, we can confirm that there is no possibility of any credit card information leak from this incident, since the server in question stores no credit card information. We estimate that the suspension will continue for a few days until we complete our investigation and counter-measures. We will update you as we learn more.
More information will be posted as we learn it.