Blizzard seems to be having a hell of a time with its online auction houses lately.
Last month, a Diablo III patch introduced a gold-duplicating bug that forced the developer to take the game's auction house offline until it could fix the bug and audit players' accounts.
This month, a rash of unauthorized account logins has forced it to disable mobile access to the World of Warcraft auction house. Players have reported fraudulent purchases and missing funds.
"We’re in the process of notifying any account holders who were not using an authenticator and whose account showed signs of unauthorized access (e.g., logging in from an unusual IP address)," said Blizzard. "If you are among this group, you will receive an email describing how to reset your account."
Blizzard says that, upon request, it will restore in-game items and gold for any accounts that have been compromised and asks that players heed its published security tips to keep their accounts as safe as possible.
At this point, it's unclear how hackers managed to gain access to players' accounts but popular theories range from vulnerabilities on Blizzard's servers to compromised smartphones being used to remotely access the auction house.
-Reporting from San Diego, GamePolitics Contributing Editor Andrew Eisen