The folks at WordPress are always working on the popular software and today has released a maintenance and security update that brings it up to version is 3.4.2.
Here is what you will find remedied:
- Fix unfiltered HTML capabilities in multisite.
- Fix possible privilege escalation in the Atom Publishing Protocol endpoint.
- Allow operations on network plugins only through the network admin.
- Hardening: Simplify error messages when uploads fail.
- Hardening: Validate a parameter passed to wp_get_object_terms().
- Fixes some issues in the admin area where some older browsers (IE7, in particular) may slow down, lag, or freeze.
- Fixes an issue where a theme may not preview correctly, or its screenshot may not be displayed.
- Fixes the use of multiple trackback URLs in a post.
- Prevents improperly sized images from being uploaded as headers from the customizer.
- Ensures proper error messages can be shown to PHP4 installs. (WordPress requires PHP 5.2.4 or later.)
- Fixes handling of oEmbed providers that only return XML responses.
- Addresses pagination problems with some category permalink structures.
- Adds more fields to be returned from the XML-RPC wp.getPost method.
- Avoids errors when updating automatically from very old versions of WordPress (pre-3.0).
- Fixes problems with the visual editor when working with captions.
You can find the download at http://wordpress.org/download/
If you are on any version of WordPress prior to 3.4 your site is vulnerable and you should get updated as soon as possible from both a bug and security perspective.