From the description given, it appears users' passwords were at risk. Given access to such passwords, unauthorized users could sign on to an account, obtain the real user's personal information, change their password, and rack up charges on the PlayStation Store. While the store saves credit card numbers, it does not display the full number to the user, so thieves would be unable to swipe credit card information for use elsewhere.
Sony said it has already fixed the issue and that the network's security has been restored. The company has contacted users that it believes may have been victims of the security breach, and suggests that concerned gamers can ensure their accounts are safe simply by logging in with their pre-set password.
If users are unable to log in, Sony is asking them to reset their passwords, check to see what unauthorized activity has taken place, and e-mail the company at [email protected] for assistance.
A warning to those that have any financial information stored on their account.

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