XSS Injection

The main idea and theory behind XSS Injection is getting a malicious script one crafted, to run on a victim's computer via a specially crafted attack due to a vulnerability in the way a server side script parses and displays input data. One can get this attack to run on a victim's computer in various ways, depending on the vulnerable script, usually administered through a malicious link or in some cases one may be exploited just browsing the vulnerable website normally.