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User Management System 2.0 Cross Site Scripting

User Management System 2.0 Cross Site Scripting
Posted Apr 23, 2020
Authored by Besim Altinok

User Management System version 2.0 suffers from a persistent cross site scripting vulnerability.

tags | exploit, xss
SHA-256 | f51d19d1447f0566a48f9c13d1dd3b32e124bd3d1497ca12929cf00aaa1a8f32

User Management System 2.0 Cross Site Scripting

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# Exploit Title: User Management System 2.0 - Persistent Cross-Site Scripting
# Author: Besim ALTINOK
# Vendor Homepage: https://phpgurukul.com/
# Software Link: https://phpgurukul.com/user-registration-login-and-user-management-system-with-admin-panel/
# Version: v2.0
# Tested on: Xampp
# Credit: İsmail BOZKURT

------ Details:

1- Vulnerable code is here:

Insert user registration information to the DB without filtering.

if(isset($_POST['signup']))
{
$fname=$_POST['fname'];
$lname=$_POST['lname'];
$email=$_POST['email'];
$password=$_POST['password'];
$contact=$_POST['contact'];
$enc_password=$password;
$msg=mysqli_query($con,"insert into
users(fname,lname,email,password,contactno)
values('$fname','$lname','$email','$enc_password','$contact')");
if($msg)
{
echo "<script>alert('Register successfully');</script>";
}
}

2- In the admin dashboard:

Get fullName from DB and print it without any filtering

<?php $ret=mysqli_query($con,"select * from users");
$cnt=1;
while($row=mysqli_fetch_array($ret))
{?>
<tr>
<td><?php echo $cnt;?></td>
<td><?php echo $row['fname'];?></td>
<td><?php echo $row['lname'];?></td>
<td><?php echo $row['email'];?></td>
<td><?php echo $row['contactno'];?></td> <td><?php echo
$row['posting_date'];?></td>
</tr>

4- If we insert value of the "fname" as "script>prompt(1)</script>", we can
perform this attack as "Stored XSS"
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