I just received this from cPanel
(the email looked legit)
You are receiving this email because you have opened a ticket with our support staff in the last 6 months. cPanel, Inc. has discovered that one of the servers we utilize in the technical support department has been compromised. While we do not know if your machine is affected, you should change your root level password if you are not already using ssh keys. If you are using an unprivileged account with "sudo" or "su" for root logins, we recommend you change the account password. Even if you are using ssh keys we still recommend rotating keys on a regular basis.
As we do not know the exact nature of this compromise we are asking for customers to take immediate action on their own servers. cPanel's security team is continuing to investigate the nature of this security issue.
--cPanel Security Team