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HTB22792: XSS in Pixelpost



Vulnerability ID: HTB22792
Reference: http://www.htbridge.ch/advisory/xss_in_pixelpost.html
Product: Pixelpost
Vendor: Pixelpost ( http://www.pixelpost.org/ ) 
Vulnerable Version: 1.7.3
Vendor Notification: 11 January 2011 
Vulnerability Type: XSS (Cross Site Scripting)
Status: Awaiting Vendor Response
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 "/index.php" script to properly sanitize user-supplied input in "visitorinfo" 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.

The following PoC is available:


GET /index.php?popup=comment&showimage=1 HTTP/1.1
Cookie: visitorinfo=1'><script>alert("XSS")%3B</script>%25