WordPress 3.9.2 Security Release
WordPress.org just recently release WordPress 3.9.2 Security Release to address the Security Vulnerabilities found in the previous version. If your company or personal website is using WordPress Platform we highly suggest to check if you are using old version and if it is yes, better start backing up your websites and do the update. FYI, one of the main fixes of WordPress version 3.9.2 is to address Denial of Service Issue (DOS Attack) on Php’s Xml processing, Xml entity attacks and protection against Brute Attacks.
For more details visit this link http://codex.wordpress.org/Version_3.9.2