My erp is being really tested for vulnerabilities.

I have fixed all but one...

they uploaded an .xml file with the following code:

Code:
<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">


<svg version="1.1" baseProfile="full" xmlns="http://www.w3.org/2000/svg">
   <polygon id="triangle" points="0,0 0,50 50,0" fill="#009900" stroke="#004400"/>
   <script type="text/javascript">
      alert(origin);
   </script>
</svg>
Is there a way I can also check for malicious code inside uploaded .xml's?