It looks like I may have a serious security issue. I just received a flurry of emails (5) related to a site I’m building. They all say:
This message was created automatically by mail delivery software.
A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:.(JavaScript must be enabled to view this email address)
Mail sent by user nobody being discarded due to sender restrictions in WHM->Tweak Settings
I have replaced the email address above. Three of the 5 mails have the same address, the other two have a different address. I’m quite certain that these are stolen addresses and that the individuals have no idea this is happening in connection with their addresses.
I went into my log and found that a user “test” had logged in at that time. I do not have a public registration or log-in page for this site; it’s not a site with self-registered members (or is not intended to be, anyway). The CMS is used to build only publicly accessible pages.
In “View Members” I found user “test” in the Super Admins group. His “member since” date was the same as my own SuperAdmin account, so I assume that he somehow managed to clone my account. (The system log shows only one entry for “test” which is today’s login. There is no record in the log of the creation of “test’s” account.)
I immediately deleted the account. So far, no other evidence of tampering, but I can’t be certain.
How did this happen, and what do I do now? Thanks.