Ticket #20625: 20625.diff

wp-admin/media.php

@@ -59 +59 @@
         $att = get_post($att_id);
 
         if ( empty($att->ID) ) wp_die( __('You attempted to edit an attachment that doesn’t exist. Perhaps it was deleted?') );
+        if ( 'attachment' !== $att->post_type ) wp_die( __('You attempted to edit an item that isn’t an attachment. Please go back and try again.') );
         if ( $att->post_status == 'trash' ) wp_die( __('You can’t edit this attachment because it is in the Trash. Please move it out of the Trash and try again.') );
 
         add_filter('attachment_fields_to_edit', 'media_single_attachment_fields_to_edit', 10, 2);