Cross Site Scripting XSS
Definition
Cross-Site Scripting (XSS) is a web vulnerability that allows attackers to inject malicious scripts into web pages viewed by other users.
Examples
- An attacker injects JavaScript into a comment section that steals cookies from users who view the comment.
- A malicious link containing a script is shared with a victim; when clicked, it executes in the browser and sends data to the attacker.
Overview
Cross-Site Scripting, commonly abbreviated as XSS, is a type of security vulnerability found in web applications. It occurs when an application allows users to input content that is then rendered on the page without properly validating or sanitizing it. This gives attackers an opportunity to inject and execute malicious scripts in the browser of anyone who views that page.
XSS attacks are used to steal cookies, hijack sessions, log keystrokes, redirect users, or impersonate victims. The attack itself runs in the user’s browser, making it difficult for traditional firewalls or intrusion detection systems to detect or prevent it directly.
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