Abstract
Recognized as Web Hacking Top 10 Techniques in the year 2012
From : https://ibreak.software/2012/11/cross-site-port-attacks-xspa-part-1/
Cross Site Port Attack (XSPA) is a vulnerability that allows attackers to fetch status of TCP ports (and grab service banners) over the Internet or internal systems by abusing a feature in web applications that makes HTTP requests using attacker supplied URLs.