You may have heard about the WordPress security issue found out by the guys from Sucuri team. If not, long story short, over 162,000 WordPress sites were used for Distributed Denial of Service Attack (DDoS) trough a security whole. The WordPress team knows about the problem but it is not expected to be solved as it’s a default feature of WordPress, they state. WPshed.com is one of the sites that have been hit. You can check out if your site is being used to attack others here.
I wanted to address this issue immediately so I updated WP Sanitize, a security plugin I wrote a long time ago but still using it today. You just need to install and activate the plugin and amongst other security patches and daily database cleanup, the current DDoS problem is solved as well.
Please note that the above link will be updated. Why?
This plugin is part of the assets I've sold together with VibeThemes.com so at this point they are the official owners of the plugin. I've sent them an email with the update for the DDoS security patch and I'm sure they will update the official WordPress repository where the plugin is hosted. Until then, I highly recommend you to update your version to this one or install the plugin if you don't have it installed yet.
Speaking of VibeThemes.com, I know for a fact that they are like me, beside the site design, very interested in speed and security which as you can see, it is a very important factor for your website success. Check out their themes here.
Note to ones I manage their websites. Because you are awesome and chosen wisely, your websites are already protected from this DDoS security whole so you don't have to do anything