Multiple cross-site scripting (XSS) vulnerabilities in the wp_ajax_save_item function in wonderpluginaudio.php in the WonderPlugin Audio Player plugin before 2.1 for WordPress allow remote attackers to inject arbitrary web script or HTML via the (1) itemname or (2) itemcustomcss parameter in a wonderplugin_audio_save_item action to wp-admin/admin-ajax.php or the itemid parameter in the (3) wonderplugin_audio_show_item or (4) wonderplugin_audio_edit_item page to wp-admin/admin.php.