[Q] one image folder for frontend and backend

[adriandrozdz]

I start to deploy an app based on Yiinatializr-intermediate and it's been working fine but I've come across this issue.
Backend users will add articles and upload images. I created folder upload in site

directory do I have
upload
frontend
common
backend

I'm able to upload pictures to upload folder from backend app but I can't display it in frontend

<?php echo CHtml::image(Yii::app()->basePath . '/../upload/images/medium/' . $sport[0]->primaryPicture, ''); ?>

return no image
in Firebug console I get

"NetworkError: 404 Not Found - http://adrenalina.vhost/home/webadmin/www/html/adrenalina/upload/images/medium/2745-5011639458_374e174cdd_o.jpg"

The image is of course there

<?php echo Yii::app()->basePath; ?>

return my basePath

/home/webadmin/www/html/adrenalina/frontend 

Hope this could help you help me :)