WordPress 3.0.5 Update Fixes Security Issues
WordPress 3.0.5 has been released, and is primarily a security update focusing on vulnerabilities which can be exploited through untrusted user accounts. This follows the recent 3.0.3 and 3.0.4 updates which were also security-focused. If your WordPress installation does not have any non-admin users, then this update is less urgent, however it is recommended that you update as soon as possible anyway.
Here is a description of the five main updates:
Two moderate security issues were fixed that could have allowed a Contributor- or Author-level user to gain further access to the site.
One information disclosure issue was addressed that could have allowed an Author-level user to view contents of posts they should not be able to see, such as draft or private posts.
Two security enhancements were added. One improved the security of any plugins which were not properly leveraging our security API. The other offers additional defense in depth against a vulnerability that was fixed in previous release.
WordPress 3.1 is currently at RC4 and is expected to be officially released soon.