Sony has warned PlayStation Network users of a potential breach in security that would allow unauthorized users to access personal information of legitimate users.

In the consumer alerts section of the official PlayStation website, Sony wrote, "We have found out that there has been a possibility of unauthorized access to personal information on the PlayStation Store through PCs, a content download service of the PlayStation Network.

"Although unlikely, it is possible that the passwords of a small percentage of PlayStation Network users may have been changed through unauthorized access, making it possible to view users' personal information and/or use the Wallet for the PlayStation Store."

Sony said that while unauthorized users may be able get past security measures, the PlayStation Store does not display full credit card numbers.

Sony added that it has taken "immediate measures" to fix the security issue.

"We have investigated the extent of unauthorized access and possible alteration of passwords that could have occurred before corrective measures were taken, and are directly contacting customers who may have been affected by this incident."

Sony suggested that PlayStation Network users try signing into the service to make sure that their account hasn't been violated.