Data security, Remote access, Vulnerability management

Understanding WebApp Client-Side Security With Source Defense – Matt McGuirk – PSW #743

This segment will be an opportunity to discuss web application client-side security with subject matter expert Matt McGuirk from Source Defense. Modern web applications have a massive and misunderstood attack surface that exists within the webpages they serve.

Potential discussion topics:

- A visual overview of the problem

- A simulated client-side attack

- How to evaluate client-side risk on a given web site

- What technologies are available to defend against client-side attacks

- Historical case studies of landmark attacks

Segment Resources:

"Magecart 101" - a courseware-style overview of the problem for security practioners:

A quick five minute explainer on the problem and Source Defense's solution:

Source Defense's brand new (as of 5/25/22) "State of the Industry" report for client-side security:

This segment is sponsored by Source Defense. Visit to learn more about them!

Sponsored By

Source Defense
Full episode and show notes


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Matt McGuirk
Matt McGuirk
Solution Architect at Source Defense

Matt McGuirk is an expert in JavaScript, web technologies, and both client-side risk and client-side attacks. He has over 15 years of experience in web application development, website administration, and cybersecurity. Additionally, he has provided consultation and analysis to Fortune 50 companies on how best to secure their customer-facing web properties and business critical web applications. Matt lives in the American Northeast with his wife and two dogs.


Paul Asadoorian
Paul Asadoorian
Founder at Security Weekly
Adrian Sanabria
Adrian Sanabria
Director of Product Management at Tenchi Security
Josh Marpet
Josh Marpet
Executive Director at RM-ISAO
Tyler Robinson
Tyler Robinson
Director of Offensive Security & Research at Trimarc and Founder & CEO of Dark Element at Trimarc Security
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