A wordpress security system plugin which will check every HTTP request against a given set of rules to filter out malicious requests.
WordPress Security Plugin - Perform over 23 Basic Security Activities for your blog and get a free malware scan at the same time! See more details at
SmartFilter Security is the best security plugin to protect your WordPress site from malicious code injections in your posts and comments.
WordPress core security class: A Web Application Firewall to protect your WordPress web portal