I'm here to tell that the OP exploit is back.

I'm not sure whether this is just my server or if it's possible with all servers, but my server just got attacked by two guys, being able to perform all commands, ban people, etc etc... I just shut the server down... Man this sucks. I won't ask for upvotes, but please, make sure the community is aware of this. Again, not sure if it's the OP exploit or server security, but the server should be 95% secured. Please leave comments on how this could've happened and how i can prevent it.

EDIT: People say it's about Multicraft control panel. We will contact our host ASAP and tell them. I'm leaving our host too, cause they provided an insecure service. thanks for your help on this matter.