A new version of WordPress is available for download. WordPress version 3.3.1 includes a fix for a disclosed reflected cross-site scripting vulnerability reported by Joshua H., Hoang T., Stefan Zimmerman, Chris K and the GoDaddy team. It also includes 15 other fixes for several other bugs.
Even though the reflected cross-site scripting vulnerability is hard to reproduce, it might be used in targeted attacks. Therefore it is recommended to upgrade your WordPress installation at the earliest possible. More information on the new WordPress release can be found in the WordPress Codex.