April 9, 2026

Episode 169: Attacking OAuth 2.1

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Show Notes

Episode 169: In this episode of Critical Thinking - Bug Bounty Podcast gr3pme goes over some of the changes from OAuth 2.0 vs 2.1 and how Hackers can capitalize.

Got any ideas and suggestions? Feel free to send us any feedback here: info@criticalthinkingpodcast.io

Shoutout to YTCracker for the awesome intro music!

====== Links ======

Follow your hosts Rhynorater, rez0 and gr3pme on X:

https://x.com/Rhynorater

https://x.com/rez0__

https://x.com/gr3pme

Critical Research Lab:

https://lab.ctbb.show/

====== Ways to Support CTBBPodcast ======

Hop on the CTBB Discord at https://ctbb.show/discord!

We also do Discord subs at $25, $10, and $5 - premium subscribers get access to private masterclasses, exploits, tools, scripts, un-redacted bug reports, etc.

You can also find some hacker swag at https://ctbb.show/merch!

====== This Week in Bug Bounty ======

Intigriti is providing free Burp Pro for Hackers!

https://www.intigriti.com/blog/news/intigriti-collaborates-with-portswigger-to-support-ethical-hacking-excellence

====== Resources ======

Django-allauth Account Takeover (ZeroPath Audit)

https://zeropath.com/blog/django-allauth-account-takeover-vulnerabilities

CVE-2025-4144: Cloudflare Workers PKCE Bypass

https://github.com/cloudflare/workers-oauth-provider/security/advisories/GHSA-qgp8-v765-qxx9

CVE-2025-54576: OAuth2-Proxy Auth Bypass

https://zeropath.com/blog/cve-2025-54576-oauth2-proxy-auth-bypass

====== Timestamps ======