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XSS in CLANSPHERE



Vulnerability ID: HTB22693
Reference: http://www.htbridge.ch/advisory/xss_in_clansphere.html
Product: CLANSPHERE
Vendor: csphere.eu ( http://www.csphere.eu/ ) 
Vulnerable Version: 2010.0 Final
Vendor Notification: 02 November 2010 
Vulnerability Type: XSS (Cross Site Scripting)
Status: Fixed by Vendor
Risk level: Medium 
Credit: High-Tech Bridge SA - Ethical Hacking & Penetration Testing (http://www.htbridge.ch/) 

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

The vulnerability exists due to failure in the "/mods/gallery/print_now.php" script to properly sanitize user-supplied input in "pic" and "size" variables. 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://[host]/mods/gallery/print_now.php?pic=%22%3E%3Cscript%3Ealert%28%22XSS%22%29;%3C/script%3E
http://[host]/mods/gallery/print_now.php?pic=1&size=%22%3E%3Cscript%3Ealert%28%22XSS%22%29;%3C/script%3E


Solution: Upgrade to the most recent version