wordpress WPImageEditorImagick 指令注入漏洞修复

在/wp-includes/media.php的_wp_image_editor_choose函数内部找到： 

$implementations = apply_filters( 'wp_image_editors', array( 'WP_Image_Editor_Imagick' ,  'WP_Image_Editor_GD' ) ); 

修改为下面这行：（即调换最后数组的顺序） 

$implementations = apply_filters( 'wp_image_editors', array(  'WP_Image_Editor_GD' ,'WP_Image_Editor_Imagick' ) ); 

即可。