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Date: Thu, 28 Jan 2010 15:08:23 +0000
From: research <>
To: <>
Cc: <>
Subject: PR09-19: Cross-Site Scripting (XSS) on CommonSpot server

PR09-19: Cross-Site Scripting (XSS) on CommonSpot server

Vulnerability found: 17th December 2009

Vendor informed: 18th December 2009

Severity: Medium

Successfully tested on: Commonspot server


Commonspot server is vulnerable to a vanilla XSS

Vulnerable server-side script: 'commonspot/utilities/longproc.cfm'

Unfiltered parameter: 'arbitrary'


Simple XSS Proof of Concept (PoC) URL:;--%3E%3C/script%3E%3Cscript%3Ealert%281%29%3C/script%3E


An attacker may be able to cause execution of malicious scripting code
in the browser of a victim user who clicks on a link to a CommonSpot server.

This type of attack can result in non-persistent defacement of the
target site, or the redirection of confidential information (i.e.:
session IDs or passwords) to unauthorised third parties.

Credits: found by Richard Brain & Jan Fry  - ProCheckUp Ltd


Copyright 2009 Procheckup Ltd. All rights reserved.

Permission is granted for copying and circulating this Bulletin to the
Internet community  
for the purpose of alerting them to problems, if and only if, the
Bulletin is not edited  
or changed in any way, is attributed to Procheckup, and provided such
reproduction and/or  
distribution is performed for non-commercial purposes.

Any other use of this information is prohibited. Procheckup is not
liable for any misuse  of this information by any third party.

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