FORUMHOME hacking

[oas]

Hello,

Has been hacked for my forum , as in the pictures attached, it is from the database template .

I change the FORUMHOME template & my site back .

My question is How did the change the template?
How can close this?

My forum 3.8.3 .

Thank you.

[Dismounted]

Most vulnerabilities comes from installed modifications, and not vBulletin itself. It is hard to pinpoint exactly what is exposed.