Magento : CMS upload image fail silently

Question

I am trying to figure out why the tinyMCE WYSIWYG editor in the CMS module of Magento will not upload images. I can create/delete folders but any file will simply not get uploaded, and there seems to be no message as to why the file is not successfully written on the server.

Anyone may have an idea why?

** Update **

I'm using Magento 1.6.2. I have tried to track down the problem and it seems that the controller never gets executed. I have added a line to log the arguments in the uploadAction() action (in Mage_Adminhtml_Cms_Wysiwyg_ImagesController) and nothing gets logged.

This is project inherited from someone else, and was modified to some extend, but nothing seems to point out that this part of Magento would have been touched in anyway by the modifications.

** EDIT**

The project associated with this question has been dropped and I no longer can provide an answer to this question. If anyone can confirm a working answer (as this problem was apparantly common with Magento), I will gladly mark that answer as "accepted".

Otherwise, I will flag this question for removal for the aformentioned reasons.

Thank you.

Answer 1

Other than solutions provided here, it may occur when you use a CDN (or a different domain) for your javascript and media files in admin panel. If you use CDN, use it for your website(s) scope and use your own domain for default scope. It will make your website(s) media and javascript files to be loaded from CDN, and backend's media and javascript files to be loaded from your own domain. This will solve your problem.