Kirby CMS 2.5.12 - Cross-Site Scripting

# Exploit Title: Kirby CMS 2.5.12 - Cross-Site Scripting
# Date: 2018-07-22
# Exploit Author: Zaran Shaikh
# Version: 2.5.12
# CVE :  NA
# Category: Web Application

# Description
# The application allows user injected payload which can lead to Stored
# Cross Site Scripting.

# Proof of Concept
# 1. Visit the application as low priv user
# 2. Go to add page option
# 3. Under title, enter any XSS payload like:

<script>alert("XSS");</script>

# 4. Upon the payload being injected, the subsequent page is triggered
# with XSS