Andrew Nacin posted on the official WordPress.org blog this evening that a “security hardening update” is available for all WordPress users.
On the cusp of WordPress 3.1, this security update is being applied to both 3.0.5. Two of the security fixes prevent author and contributor-level users from accessing unauthorized levels of a site. A third fix prevents author-level users from viewing draft and private posts by other authors. Finally, two “security enhancements” were made: one for plugins that don’t use the WordPress security API and the other to further harden security from a previous release.
All of the websites i did and run wordpress are now updated to the new version