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Cross-Site Scripting

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May 1, 2024 Updated June 19, 2025 17 minute read

An Introduction to Cross-Site Scripting (XSS)

Cross-Site Scripting, often abbreviated as XSS, is a common type of security vulnerability typically found in web applications. At its core, XSS allows an attacker to inject malicious scripts (most commonly client-side scripts like JavaScript) into web pages viewed by other users. This occurs when an application takes untrusted data and sends it to a web browser without proper validation or escaping. Essentially, the attacker tricks a trusted website into delivering their harmful code to an unsuspecting user's browser.

Path to Cross-Site Scripting

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We've curated five courses to help you on your path to Cross-Site Scripting. Use these to develop your skills, build background knowledge, and put what you learn to practice.

Sorted from most relevant to least relevant:

Exploiting and Securing Vulnerabilities in Java Applications

Exploiting and Securing Vulnerabilities in Java...

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CISSP Domain 8: Software development security

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Hacking in Practice: Intensive Ethical Hacking MEGA Course

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Identifying Security Vulnerabilities

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Red and Blue Team Foundations Course - VAPT & Infosec Basics

Red and Blue Team Foundations Course - VAPT & Infosec...

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Reading list

We've selected three books that we think will supplement your learning. Use these to develop background knowledge, enrich your coursework, and gain a deeper understanding of the topics covered in Cross-Site Scripting.

Malware

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Provides a detailed overview of XSS attacks, including how to exploit them and how to defend against them.

Malware: Fighting Malicious Code

Paperback

$$$

Android Security Cookbook

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Provides a practical guide to HTTP security, including how to defend against XSS attacks.

Android Security Cookbook

Kindle Edition

Automated Threat Handbook

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Provides a brief overview of XSS attacks, including how to identify and prevent them.

Automated Threat Handbook

Paperback

Relevant careers

Web Developer

Security Analyst

Ethical Hacker

Security Engineer

Cloud Security Engineer

Information Security Analyst

Security Consultant

Penetration Tester

Vulnerability Researcher

Cybersecurity Specialist

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