id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
13475	File upload with CORS (cross origin resource sharing)	Piotrek Koszuliński		"As mentioned in http://docs.ckeditor.com/#!/guide/dev_file_upload

> You can also add custom request headers or set flags for the default request. This is especially useful for enabling Cross-Origin requests. For more information about Cross-Origin Resource Sharing see here:
> 
> editor.on( 'fileUploadRequest', function( evt ) {
>     var xhr = evt.data.fileLoader.xhr;
> 
>     xhr.setRequestHeader( 'Cache-Control', 'no-cache' );
>     xhr.setRequestHeader( 'X-CUSTOM', 'HEADER' );
>     xhr.withCredentials = true;
> } );

This seems to be a pretty common case and it does not require lots of code, so I would consider adding an option for it. WDYT?"	New Feature	confirmed	Normal		General	4.5.0 Beta