HTB22953: XSS in Max's PHP Photo Album

Vulnerability ID: HTB22953
Reference: http://www.htbridge.ch/advisory/xss_in_max_s_php_photo_album.html
Product: Max's PHP Photo Album
Vendor: http://www.phpf1.com ( http://www.phpf1.com )
Vulnerable Version: 2008-04-01
Vendor Notification: 12 April 2011
Vulnerability Type: XSS (Cross Site Scripting)
Risk level: Medium
Credit: High-Tech Bridge SA Security Research Lab ( http://www.htbridge.ch/advisory/ )

Vulnerability Details:
User can execute arbitrary JavaScript code within the vulnerable application.
The vulnerability exists due to failure in the "showimage.php" script to properly sanitize user-supplied input in "id" 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:

http://[host]/showimage.php?id="><script>alert("XSS");</script>