A comprehensive tutorial on cross-site scripting Created by Jakob Kallin and Irene Lobo Valbuena OverviewXSS AttacksPreventing XSSSummary Part One: Overview What is XSS? Cross-site scripting (XSS) is a code injection attack that allows an attacker to execute malicious JavaScript in another user's browser. The attacker does not directly target his victim. Instead, he exploits a vulnerability in a w