This Arstechnica article indicates that there may be a newly-discovered zero-day vulnerability in vBulletin v4 and v5 which allows an attacker to fully expose account IDs, password hashes and possibly the entire database.
Normally, this would not concern me beyond the low probability of being e-mail spammed. However, since game and forum accounts are linked, the possibility of certain types of user information being exposed is unsettling.
Is Turbine aware of this and what steps, if any, have been taken to avoid user data being compromised?