I was just about to update Wordpress when I noticed that the admin panel shows the number of administrators as 2, but only lists one (me). When I went into mysql (I'm not really familiar with it, so I stumbled around alot), I found that there is a second user ID#5, named "WordPress" with an url leading to http://www.com. No registration date.
I can't see any changes to my site, no new posts or comments visible. Is this just a weird quirk that WordPress does, or is this a hack?
I don't have much experience with the database and the backend, so any help is appreciated.