Feedback.asp in Xiao5uCompany 1.7 has XSS because the XSS protection mechanism in Safe.asp is insufficient (for example, it considers SCRIPT and IMG elements, but does not consider VIDEO elements).
https://github.com/WhiteRabbitc/WhiteRabbitc.github.io/blob/master/2018/Xiao5uCompany_1.7_xss.doc