3.0.4 Important Security Update
Version 3.0.4 of WordPress, available immediately through the update page in your dashboard or for download here , is a very important update to apply to your sites as soon as possible because it fixes a core security bug in our HTML sanitation library, called KSES. I would rate this release as “critical.” This issue affects all versions of WordPress prior to 3.0.4, so if you are still on a 2.X release you need to update as well
Read the original post:
3.0.4 Important Security Update
