I am unfortunately not responsible for the technical details on my page, but i guess we used a backup, installed all plugins again and deleated the new admin. We also updated mailpoet and wordpress to the last version.
Hi, we found the problem, in my case the plugin mailpoet caused all this mess. They recently had some security issues!
Hi to all of you,
we found out that like some of you said a plugin was responsible for that mess. In my case we are pretty sure that is was mailpoet which recently had some security problems!