Forget it I found it. It was indeed in the description of the forums but I thought I could see it without going into edit mode. My mistake.
Anyway, how can this happend? How can hacker change the description of my forums?
I propably should change my password, but should I look for other admin accounts?
by definition, hackers hack into your files. they figure out a way, that is why phpbb comes out with updates, just like microsoft and everyone else.
you are 7 versions out of date and using one of the most open versions to hackers.
check all your forum titles and descriptions, make sure there are no admins you don't know about. make sure there are no files on the server that don't belong.
then change all your passwords ( ftp/controlpanel/mysql/phpbb ) then update to the latest version and stay updated. you will be as save as possible.