It’s important to catch a successful hack as soon as possible if one does occur, so you can make the changes needed to lock that hacker out once again. Surprisingly, it’s not always easy to tell when a hack has taken place, so keep an eye out for some common warning signs. Pages that will no longer load, or are slow to load, are a potential sign that something has happened. If you use Google Webmaster Tools, you may also get a notification through that platform that a security issue has been spotted. Finally, if you notice that new users have been created within WordPress — and you or another authorized person did not create them — that’s a sure sign of foul play.