As I'm sure you know by now I'm a big fan of Wordpress and tweaking the hell out of it... but there are a few negative aspects of running a Wordpress site, one of them being security... I strongly recommend signing up for https://sucuri.net they monitor your site 24/7 and if you have any issues they fix it right away... Here is a great article in Smashing Magazine for more info https://wp.smashingmagazine.com/2011/11/10/securing-your-wordpress-website