WordPress 3.0.2 is available and is a mandatory security update for all previous WordPress versions.
This maintenance release fixes a moderate security issue that could allow a malicious Author-level user to gain further access to the site, addresses a handful of bugs, and provides some additional security enhancements.
Other bugs and security hardening:
- Remove pingback/trackback blogroll whitelisting feature as it can easily be abused.
- Fix canonical redirection for permalinks containing %category% with nested categories and paging.
- Fix occasional irrelevant error messages on plugin activation.
- Minor XSS fixes in request_filesystem_credentials() and when deleting a plugin.
- Clarify the license in the readme.
- Multisite: Fix the delete_user meta capability.
- Multisite: Force current_user_can_for_blog() to run map_meta_cap() even for super admins.
- Multisite: Fix ms-files.php content type headers when requesting a URL with a query string.
- Multisite: Fix the usage of the SUBDOMAIN_INSTALL constant for upgraded WordPress MU installs.
Download 3.0.2 or update automatically from the Dashboard > Updates menu in your site’s admin area. You should update immediately even if you do not have untrusted users.