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