On Christmas Day, the Steam platform was met with some security issues when users were able to see ‘other people’s’ account information from emails to last digits off their credit card. While this information was visible to other people breaching somewhat very sensitive private details, you couldn’t make purchases on that account as there wasn’t enough information to do so.
Valve today has finally released a statement talking about what happened. The company has stated “…caching configuration was deployed that incorrectly cached web traffic for authenticated users. This configuration error resulted in some users seeing Steam Store responses which were generated for other users” – which was implemented by a third party in response to the DoS attacks.
After identifying the caching issue, Valve shut down the Steam store until the issue was fixed and has apologized about the error, information exposed and interruption of service.
You can read the full statement here.