Forum Announcement: ALL MEMBERS INCLUDING ADMINIS, SUPER MODS, MODS ARE REQUESTED TO CHANGE THEIR LOGIN PASSWORDS EFFECTIVE IMMEDIATELY.
MyBB 1.9’s highlights — other than the theme system — is the introduction of modern password hashing. The md5-based hash function, used in MyBB since its very beginning, will be replaced by bcrypt, making it much more difficult to obtain original passwords basing on new hash values in case of a data breach.