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## https://sploitus.com/exploit?id=PACKETSTORM:156289
# Exploit Title: CHIYU BF430 TCP IP Converter - Stored Cross-Site Scripting  
# Google Dork: In Shodan search engine, the filter is "CHIYU"  
# Date: 2020-02-11  
# Exploit Author: Luca.Chiou  
# Vendor Homepage: https://www.chiyu-t.com.tw/en/  
# Version: BF430 232/485 TCP/IP Converter all versions prior to 1.16.00  
# Tested on: It is a proprietary devices: https://www.chiyu-t.com.tw/en/product/rs485-to-tcp_ip-converter_BF-430.html  
# CVE: CVE-2020-8839  
  
# 1. Description:  
# In CHIYU BF430 web page,  
# user can modify the system configuration by access the /if.cgi.  
# Attackers can inject malicious XSS code in "TF_submask" field.  
# The XSS code will be stored in the database, so that causes a stored XSS vulnerability.  
  
# 2. Proof of Concept:  
# Access the /if.cgi of CHIYU BF430 232/485 TCP/IP Converter.  
# Injecting the XSS code in parameter “TF_submask”:  
# http://<Your Modem IP>/if.cgi?TF_submask=%22%3E%3Cscript%3Ealert%28123%29%3C%2Fscript%3E  
  
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