WPSec UK:
Over 75 million websites run on WordPress. Remarkably enough thousands of WP sites are vulnerable to attacks and get hacked each day. You can lose all your data, it can cost thousands of dollars, or worse, attackers might use your WordPress to target your visitors. Bots scan the web automatically for weak websites and hack into them within seconds. If your WordPress is vulnerable, it will be only a matter of time before you run into trouble. Thats why you should get started as soon as possible and check if your WordPress is prone to attack.