WordPress is one of the best blogging platforms when it comes to ease of use, plugins, features, functionality and in every practical need related to blogging CMS. Recently WordPress has released 3.0.3 which has some of the core issues containing some cross-site scripting issues. The 3.0.4 WordPress Update is quoted to be “Critical Security Update” as it fixes some of the core vulnerabilities identified in the previous versions of WordPress. In technical terms it fixes a core security bug in the HTML sanitation library of WordPress called KSES.
We strongly recommend you to upgrade to latest version of WordPress from your WordPress dashboard.
To do that same, you can sign into your WordPress Dashboard and go to Dashboard > Updates
If you prefer to manually update it, you can download the latest WordPress Version here.