Wordpress before 2.8.3 allows remote attackers to gain privileges via a direct request to (1) admin-footer.php, (2) edit-category-form.php, (3) edit-form-advanced.php, (4) edit-form-comment.php, (5) edit-link-category-form.php, (6) edit-link-form.php, (7) edit-page-form.php, and (8) edit-tag-form.php in wp-admin/.
http://www.openwall.com/lists/oss-security/2009/08/04/5
http://www.debian.org/security/2009/dsa-1871
http://wordpress.org/development/2009/08/wordpress-2-8-3-security-release/