I'm developing an standard FAQ using Knowledge Base Articles. I've defined an Article Type FAQ which contains a Rich Text field called "Answer".

The FAQ articles are exposed to an external web site through a custom Apex web service. That WS query and sort the content that should be render by the external site. This Apex hit the FAQ_kav object to get the field content.

Note: the WS is hit by a full access API user.

So far, everything is working fine, but:


When the user insert an inline image using the Rich Editor's upload function, that image is store in something like: https://c.cs20.content.force.com/servlet/rtaImage?eid=ka3m0000000XXXX&feoid=00Nm0000000XXXX&refid=0EMm0000000XXXX

That domain (c.cs20.content.force.com) is checking the session and hence the image is private. Even when I've checked the article for Public Knowledge Base channel.

I understand that that image will be stored as a document, but I'm not abled to check as "Externally Available Image" for standard docs.


Is any security setting that I should enabled in order to expose public access to that content(images).

2 Answers 2


You can expose the image through a site. You only need to change the instance url by the site home page.

Also, you need to establish the article as public.

Site Profile Changes:

  • Set field where image is placed as visible.

  • Set Read permission to object where image is placed.

  • Go to "Category Group Visibility Settings" section and set visibility to "All Categories" in the article/s group/s.

For example:

If you have this site:


And your original image url is:


Your public image would be:


This workarround would work with any image in a Rich Text Area.

  • Hi @robertinhosedinho what if my Salesforce instance does not have a custom site per se but I am trying to expose RTA fields on the case objects?
    – GPP
    Commented Mar 5, 2017 at 21:19

I don't believe there is any way of working with the storage used for rich text fields, I've hit a similar scenario in the past and couldn't find a way around it.

You can specify a URL for images, so an alternative (if security is not required on the images) would be to host the images off-platform (maybe using Dropbox or similar for ease-of-use) of to put them into public documents. That said, getting the public URL of documents is a bit fiddly in itself!


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