WordPress 3.0.2 mandatory security update

This is a mandatory security update for all previous WordPress versions.

This maintenance release fixes a moderate security issue where a malicious Author-level user could gain further access to the site. This release also addresses a handful of bugs, and provides some additional security enhancements.

Summary

• Fix moderate security issue where a malicious Author-level user could gain further access to the site.

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

List of Files Revised

wp-includes/ms-files.php
wp-includes/version.php
wp-includes/comment.php
wp-includes/functions.php
wp-includes/load.php
wp-includes/canonical.php
wp-includes/capabilities.php
readme.html
wp-admin/includes/plugin.php
wp-admin/includes/file.php
wp-admin/includes/update-core.php
wp-admin/plugins.php