Did you know Wordpress is running on 11.2% of the top 100 thousands sites (Alexa Ranking).
That is a pretty decent number and shows that the platform is not only massively popular among general blogging, but also quite popular among some of the most trafficked sites in the world.
Now I will plug an infographic that I put together showing Wordpress usage among the worlds top 100K sites. 
http://hackertarget.com/wordpress-infographic/
Let me know what you thinkā¦and now might be good time to ensure your wordpress installation and plugins are up to date.