sinic.gov.co XSS vulnerability

Vulnerable URL: http://www.sinic.gov.co/EscuelasMusica/autenticacion.aspx?ReturnUrl=%2fescuelasmusica%2f!prettyPhotogaleriaescuela//0,%3Cimg%20src=x%20onerror=alert%28/XSSPOSED/%29%3E/ Details: Description| Value ---|--- Patched:| Yes, at 25.07.2017 Latest check for patch:| 25.07.2017 12:19 GMT...