I have google for this topic, but I can't found any solution.
http://ha.ckers.org/blog/20070617/another-google-xss-in-google-documents/
in this blog, RSnake Says:
June 18th, 2007 at 3:03 pm
<comment> <!– –> within iframe tags, noscript tags, and I’m sure there are several others.
I am not understand how to do.
If I filter the <,>,'," use htmlspecialchars
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