References https://mrxn.net/jswz/fumacrm-LicManage-sqli.html https://wiki.shikangsi.com/post/5978/ https://mrxn.net/tag/sql%E6%B3%A8%E5%85%A5/page/6 https://www.secevery.com/toBugInfo?id=1876575729678598146 https://mrxn.net/jswz/fumacrm-GetDropDownListContent-sqli.html