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XSS Attack

What is an XSS Attack?

Cross-Site Scripting (XSS) is a form of malicious code injection that occurs when an attacker sends a user input to a web application without proper validation. A successful XSS attack will force the browser to execute the injected code, which can be anything from opening another website in the same window as the original website, to redirecting the user to another site or loading malicious content on top of or below existing content. Regardless of what actions are performed by an XSS attack, every instance results in unauthorized access to data or functionality within a website's security context.

Additional topics related to XSS attacks include SQLi and OSI layer security.