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Cross-Site Scripting

This course introduces cross-site scripting vulnerabilities, their exploitation and possible mitigations.

7 videos  //  31 minutes of training

Course description

Cross-site scripting (XSS) vulnerabilities are commonly underrated despite being the most common source of bug bounty payouts. This course describes the different types of XSS vulnerabilities, how to identify and mitigate them, and how they can be exploited to create big-name breaches like the ones pulled off by the Magecart Group.

Course syllabus

Introduction to Cross-Site ScriptingDuration: 1:09

This video provides an introduction to the cross-site scripting course.

Introduction to Web ApplicationsDuration: 5:20

This video covers the fundamentals of web applications.

Cross-Site Scripting VulnerabilitiesDuration: 4:02

This video describes how cross-site scripting vulnerabilities can make an application vulnerable to attack.

Cross-Site Scripting ExploitationDuration: 7:10

This video describes how cross-site scripting vulnerabilities can be exploited by an attacker.

Cross-Site Scripting Case StudyDuration: 4:41

This video describes a case study of an application containing a cross-site scripting vulnerability.

Cross-Site Scripting MitigationsDuration: 5:15

This video describes mitigations for cross-site scripting vulnerabilities.

Cross-Site Scripting DemoDuration: 3:42

This video demonstrates exploitation of a cross-site scripting vulnerability.

Meet the author

Howard Poston


Howard Poston is a cybersecurity researcher with a background in blockchain, cryptography and malware analysis. He has a master's degree in Cyber Operations from the Air Force Institute of Technology and two years of experience in cybersecurity research and development at Sandia National Labs. He currently works as a freelance consultant providing training and content creation for cyber and blockchain security. He can be reached by email at or via his website at

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FireEye, Inc.

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Plans and pricing





$599 / license

Annually. Includes all content plus team admin and reporting.