… my Wordpress system seems to have been hacked. Several plug-ins were disabled, the theme switched and old posts are still not being displayed (although they are in the database and the index.php seems to be OK). I wonder what happenend and hope I’ll bring the old posts back. Any help or tips are appreciated.

Update: I still don’t know what happened. But the posts are back. It turned out that they didn’t appear because I switched the Category Visibility Plugin back on. And probably it wasn’t ready for that (?). Puuuh.