Episode 50: ­Mathias 'Fall in a well' Karlsson - Bug Bounty Prophet

Episode 50: ­Mathias 'Fall in a well' Karlsson - Bug Bounty Prophet

Episode 50: In this episode of Critical Thinking - Bug Bounty Podcast, Justin catches up with hacking master Mathias Karlsson, and talks about burnout, collaboration, and the importance of specialization. Then we dive into the technical details of MXSS and XSLT, character encoding, and give some predictions of what Bug Bounty might look like in the future…

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Today’s Guest

Episode Resources

How to Differentiate Yourself as a Hunter

MutateMethods

hackaplaneten

Article About Unicode and Character Sets

Byte Order Mark:

Character Encodings

ShapeCatcher

WAF Bypass

BountyDash

EXPLOITING HTTP'S HIDDEN ATTACK-SURFACE

Timestamps:

(00:00:00) Introduction

(00:10:06) Automation Setup and Assetnote Origins

(00:16:49) Sharing Tips, and Content Creation

(00:22:27) Collaboration and Optimization

(00:36:44) Working at Detectify

(00:51:45) Bug Bounty Burnout

(00:56:15) Early Days of Bug Bounty and Future Predictions

(01:19:00) Nerdsnipeability

(01:29:38) MXSS and XSLT

(01:54:20) Learning through being wrong

(02:00:15) Go-to Vulns

Jaksot(168)

Episode 168: XSSDoctor - Client-side Path Traversal Research

Episode 168: XSSDoctor - Client-side Path Traversal Research

Episode 168: In this episode of Critical Thinking - Bug Bounty Podcast we’re getting a visit from the XSS Doctor. Jonathan joins us to go through his Client-side workflow, run labs, and diagnose some ...

2 Huhti 1h 35min

Episode 167: Stealing Bugs with Valeriy Shevchenko

Episode 167: Stealing Bugs with Valeriy Shevchenko

Episode 167: In this episode of Critical Thinking - Bug Bounty Podcast we welcome Valeriy Shevchenko to talk about program management, anchor programs, and Theft in Bug Bounty.Follow us on twitter at:...

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Episode 166: Rez0’s Top Claude Skill Secrets

Episode 166: Rez0’s Top Claude Skill Secrets

Episode 166: In this episode of Critical Thinking - Bug Bounty Podcast we talk about Rez0’s Claude Skill Secrets, when AI Generated reports fall apart, and agents vs filters.Follow us on twitter at: h...

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Episode 165: Protobuf Hacking, AI-Powered Bug Hunting, and Self-Improving Claude Workflows

Episode 165: Protobuf Hacking, AI-Powered Bug Hunting, and Self-Improving Claude Workflows

Episode 165: In this episode of Critical Thinking - Bug Bounty Podcast Justin recaps his Zero Trust World experience, before we dive into Permissions issues client-side bugs, New Hardware Hacking Clas...

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Episode 164: Tommy DeVoss: From Black Hat to Bug Bounty LEGEND

Episode 164: Tommy DeVoss: From Black Hat to Bug Bounty LEGEND

Episode 164: In this episode of Critical Thinking - Bug Bounty Podcast Justin sits down with Tommy DeVoss to talk about his origin story, Yahoo bugs, and how Tommy first got Justin into Bug BountyFoll...

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Episode 163: Best Technical Takeaways from Portswigger Top 10 2025

Episode 163: Best Technical Takeaways from Portswigger Top 10 2025

Episode 163: In this episode of Critical Thinking - Bug Bounty Podcast It’s that time of year again! We’re looking at the Portswigger Research list of top 10 web hacking techniques of 2025.Follow us o...

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Episode 162: HackerOne Training AI on Bug Bounty Data?

Episode 162: HackerOne Training AI on Bug Bounty Data?

Episode 162: In this episode of Critical Thinking - Bug Bounty Podcast Justin and Joseph sit down with HackerOne Founder & CTO Alex Rice to discuss concerns of Using Hacker Data for AI and decreasing ...

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Episode 161: Cross-Consumer Attacks & DTMF Tone Exfil

Episode 161: Cross-Consumer Attacks & DTMF Tone Exfil

Episode 161: In this episode of Critical Thinking - Bug Bounty Podcast Justin Gives us some quick hits regarding CSRF and Cross Consumer Attacks, and also touches on some breaking questions surroundin...

12 Helmi 24min