WordPress has announced the latest stable release of WordPress, version 3.0.3 is available and is a security update for all previous WordPress versions.
“This release fixes issues in the remote publishing interface, which under certain circumstances allowed Author- and Contributor-level users to improperly edit, publish, or delete posts.”
Remote publishing is disabled by default, but WordPress recomend making sure it is not enabled by checking settings on the “Settings → Writing” screen.
The files affected by the update are;
Download 3.03 at: http://wordpress.org/download/