Cross Site ScriptingCross site scripting (also known as XSS) occurs when a web application gathers malicious the user will most likely click on this link from another website, instant message. Some security people refer to Cross Site
Scripting as XSS.
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Cross Site Scripting (XSS) is a code injection vulnerability found in web applications and is generally used by malicious hackers to hijack a legitimate user's session with the website. XSS vulnerabilities are caused because of improper validation of user input by the Server and then sending this invalidated input back to the user in some exploitable form. Go through following page for more information http://www.osix.net/modules/article/?id=603