Study of different cases which detail XSS intrusions explains us how the changing web technology is nowhere close to making web applications more secure. A detailed web search will make known many stories of large-scale corporation web sites being hacked using XSS exploits, and the reports of such cases always show the same recurring costs as being of the severe kind.

Exploited XSS is normally make us of to achieve the following malicious results:
• Identifying theft
• Access to sensitive and restricted information
• Gain free access to paid for content web pages
• Spy on user’s web browsing routine
• Alter browser functionality
• Public defamation of an users
• Web application damages
• Denial of Service attacks DoS