I recently had the problem so many wordpress users have had over the past few weeks. My sites (Five sites) were all breached. The permalink structure was changed resulting in the pages/posts not showing.
Before I even realised this was a hacking attempt I just changed the permalink structure to what it was originally (I did this over a week ago). Since that time everything has worked right on all my sites.
So am I clean ?? was this hacker able to do anything other than change my permalink structure. Should I be worried about the return of the problem ? and what sort of things should I be looking out for ??