References https://mrxn.net/jswz/yonyou-nc5x-xss.html https://github.com/j2ekim/YonyouNC_Tip https://mrxn.net/jswz/page/11 https://www.cnblogs.com/pursue-security/p/17685190.html https://cn-sec.com/archives/2297101.html https://www.ddosi.org/yongyounctool/ https://github.com/youki992/YonYouNCPocTool