This might be fixed in newer versions of the rss & blog rss,

i had to customize the blog features a long time ago so I am not using them. So my code is not the same as the cms repo, but the same effect might happen?

We have some posts that have JS included

<script type="text/javascript">// <![CDATA[ ....

so when the trying to build the description part of the rss

xmlTextWriter.WriteCData(blogPost + signature);

or

excerpt = UIHelper.CreateExcerpt(dr["Description"].ToString(), excerptLength, ExcerptSuffix);

xmlTextWriter.WriteCData(excerpt);

I get  fatal error. as inserting a cdata into a cdata is not allowed.

not sure if this is affecting the latest builds of the rss or blog rss but worth pointing out, and possibly adding a check.

on my local code i am going to just use a regex to rip out the cdata from anything going into a cdata node.

i have code that does fix it... just not sure if it should be used... still looking into it

Looking into it more...

but when adding to the rss description fields, i clear all script tags ( and the content in the tags ) as well as clearing any cdata tags...

I have 2 util functions i call on the html/text before adding to the description node.

    public static string RemoveScriptTags(this string text)
    {
      var options = RegexOptions.IgnoreCase | RegexOptions.Singleline;
      var regex = new Regex(@"<script.*?>.*?</script>", options);
 
      return regex.Replace(text, "<!-- removed script tags -->");
    }


    public static string RemoveCDataTags(this string text)
    {
      var options = RegexOptions.IgnoreCase | RegexOptions.Singleline;
      var regex = new Regex(@"\<\!\[CDATA\[(?<text>[^\]]*)\]\]\>", options);
 
      return regex.Replace(text, "<!-- removed c data -->");
    }

       xmlTextWriter.WriteCData(excerpt.RemoveScriptTags().RemoveCDataTags());

not 100% on the regex yet... but it "Works for me"  need to do some more testing to make sure its my final solution

need to look up the rss spec too to see if script tags are even allowed...