WordPress Plugin Uploader is prone to a vulnerability that lets attackers upload arbitrary files. The issue occurs because the application fails to adequately sanitize user-supplied input. An attacker can exploit this vulnerability to upload arbitrary code and run it in the context of the webserver process. This may facilitate unauthorized access or privilege escalation; other attacks are also possible. WordPress Plugin Uploader version 1.0.4 is vulnerable.
Restrict access to wp-content/plugins/uploader/uploadify/uploadify.php (e.g. via .htaccess) or disable the plugin until a fix is available