Pulled from http://www.vbulletin.com/forum/forum/vbulletin-announcements/vbulletin-announcements_aa/4007195-important-message-regarding-your-account
I'll be honest, the last version of VBulletin I could stand was 3.8.x. Their 4.x stuff was a mess.This is an important message about your account.
We take your security and privacy very seriously. Very recently, our security team discovered sophisticated attacks on our network, involving the illegal access of forum user information, possibly including your password. Our investigation currently indicates that the attackers accessed customer IDs and encrypted passwords on our systems. We have taken the precaution of resetting your account password. We apologize for any inconvenience this has caused but felt that it was necessary to help protect you and your account.
To regain access to your account:
Visit the vBulletin forums at http://www.vbulletin.com/forum/settings/account
Enter in your existing password followed by your new password, twice for confirmation.
Save this page at the bottom.
Please choose a new password and do not use the same password you used with us previously. We also highly recommend that you chose a password that you are not using on any other sites.
If you have any additional questions or concerns, please feel free to contact our support team at http://www.vbulletin.com/go/techsupport or [email protected]
Sincerely,
Wayne Luke,
vBulletin Lead Technical Support.