The user information obtained during the break in includes log-in e-mail addresses for the official forums and the game itself, along with the encrypted passwords associated with those addresses. No user payment information was compromised, however, as payments are handled by a third party company that operates outside of OP Production's ecosystem.
Despite the fact that "there was absolutely no exposure of your payment or billing information of any kind," according to the statement, the possibility still exists for the stolen encrypted passwords to be decrypted, which could obviously be an issue for anyone that used the same email address and password for The War Z as they did for other, more vital internet accounts. As such, OP Productions recommends that its users change up their passwords.
Beyond the promise of future updates, no further timeline was given with respect to when the game may come back online.