iframeHTML Injection TinyMCE 5 HTML WYSIWYG

CVE	Category	Price	Severity
N/A	CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')	N/A	High

Author	Risk	Exploitation Type	Date
Unknown	Critical	Remote	2020-10-18

CVSS	EPSS	EPSSP
Not specified	0.02192	0.50148

CVSS vector description

Our sensors found this exploit at: https://cxsecurity.com/ascii/WLB-2020100106

Below is a copy:

iframeHTML Injection TinyMCE 5 HTML WYSIWYG

# Exploit Title: iframe\HTML Injection TinyMCE 5 HTML WYSIWYG 
# Date:18.10.2020
# Author: Vincent666 ibn Winnie
# Software Link: https://www.tiny.cloud/features/
# Tested on: Windows 10
# Web Browser: Mozilla Firefox
# Blog : https://pentest-vincent.blogspot.com/
# PoC: https://pentest-vincent.blogspot.com/2020/10/iframehtml-injection-tinymce-5-html.html

PoC:

We have iframe injection in TinyMCE 5. 

I use for example demo TinyMCE and Plone Cms with TinyMCE. 

Our iframe injection on the demo:

Insert - Media - Embed - our iframe code. 

In the demo Plone Cms:

Insert - Image - Caption - our iframe code. 

If a simple user can inject his code into these fields, then he can use it.

What can you do with Iframe Injection?

Different things. More often this is phishing attack.
 
With Html Injection you can change background and change something what you want.  

Picture:

https://imgur.com/a/IM6PBQh

Iframe injection video:

https://www.youtube.com/watch?v=KHbhD_zmWcI&feature=youtu.be

Html injection video :

https://www.youtube.com/watch?v=IoR89uQcbGc&feature=youtu.be

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