bugtraq - XSS in Acuity CMS

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Message-Id: <201005041241.o44Cfpgp025507@htbridge.ch>
Date: Tue, 4 May 2010 14:41:51 +0200 (CEST)
From: advisory@...ridge.ch
To: bugtraq@...urityfocus.com
Subject: XSS in Acuity CMS

Vulnerability ID: HTB22352
Reference: http://www.htbridge.ch/advisory/xss_in_acuity_cms.html
Product: Acuity CMS (asp version)
Vendor: The Collective
Vulnerable Version: 2.6.2 (ASP) and Probably Prior Versions
Vendor Notification: 19 April 2010 
Vulnerability Type: XSS (Cross Site Scripting)
Status: Not Fixed, Vendor Alerted, Awaiting Vendor Response
Risk level: Medium 
Credit: High-Tech Bridge SA (http://www.htbridge.ch/) 

Vulnerability Details:
User can execute arbitrary JavaScript code within the vulnerable application. 

The vulnerability exists due to failure in the "/admin/pages/add_page.asp" script to properly sanitize user-supplied input in "page" variable. Successful exploitation of this vulnerability could result in a compromise of the application, theft of cookie-based authentication credentials, disclosure or modification of sensitive data.

An attacker can use browser to exploit this vulnerability. The following PoC is available: 

http://site/admin/pages/add_page.asp?page=58%22%3E%3Cscript%3Ealert%28document.cookie%29%3C/script%3E