CVE-2009-3890

Unrestricted file upload vulnerability in the wp_check_filetype function in
wp-includes/functions.php in WordPress before 2.8.6, when a certain
configuration of the mod_mime module in the Apache HTTP Server is enabled,
allows remote authenticated users to execute arbitrary code by posting an
attachment with a multiple-extension filename, and then accessing this
attachment via a direct request to a wp-content/uploads/ pathname, as
demonstrated by a .php.jpg filename.