I had written a blog post regarding “How to protect your wordpress blog from web injection” before. I had mentioned a firewall plugin called “WordPress Firewall” which used to be very helpful at the time I had written the blog. But it seems the updated version of WordPress Firewall 1 & 2 both were not updated for pretty long time. It is now better to switch to something else. Upon my research of the current plugin market, I find the following WordPress Firewall plugin very useful “All in one WordPress Security & Firewall“.
So, take sometime to go on a maintenance for your wordpress blog and install the latest option to secure your blog.