# PHPGurukul Online Shopping Portal Project 2.0 - SQL Injection Vulnerability at admin login page in [`/shopping/admin/index.php`]

**Exploit Title:** `PHPGurukul Online Shopping Portal Project 2.0 - SQL Injection`

**Exploit Author:** `SeaWind`

**Vendor Homepage:** `https://phpgurukul.com/`

**Software Link:** `https://phpgurukul.com/shopping-portal-free-download/`

**Version:** `2.0`

**Vulnerable endpoint:** `http://localhost/shopping/admin/index.php `

**Tested on :** `Windows 11, XAMPP`

## Description and Impact

- In admin login page (`http://localhost/shopping/admin/index.php` ) an SQL Injection vulnerability was found at `username` parameter. This will allow attackers to access the admin panel page (for example `http://localhost:88/admin/todays-orders.php`) without any permission.

## Step to reproduce

- First visit page `http://localhost/shopping/admin/index.php`


- Then at `username` parameter, add `admin' -- -` as the payload and in the `password` parameter, fill out with anything. In my example, I will fill `username` parameter with payload `admin' -- -` and `123` as the payload for `password` parameter


- Finally click `login` button, and with that, I was able to login to admin panel page without knowing the real password


## Root Cause Analysis

<?php
session_start();
error_reporting(0);
include("include/config.php");
if(isset($_POST['submit']))
{
	$username=$_POST['username'];
	$password=md5($_POST['password']);
$ret=mysqli_query($con,"SELECT * FROM admin WHERE username='$username' and password='$password'");
$num=mysqli_fetch_array($ret);
if($num>0)
{
$extra="change-password.php";
$_SESSION['alogin']=$_POST['username'];
$_SESSION['id']=$num['id'];

header("location:change-password.php");
exit();
}
else
{
$_SESSION['errmsg']="Invalid username or password";
header("location:index.php");
exit();
}
}
?>

- This is the source code for user login in `/shopping/admin/index.php`. In the line 9 of the code, the query `SELECT * FROM admin WHERE username='$username' and password='$password'` doesn't have any validation or variable check before passing to this query at `$username` variable make it vulnerable to SQL Injection.