CTBB Full-Time Hunters' Guild Member | Recovering AppSec Engineer | /((de)?bu(g+)?(ing)?)?/i Bits, bytes, and bad ideas https://xitter.cf/t.co/0iE5bU44up

Joined March 2024
Really liked the trick used here. Wonder how many other similar products have agents doing file IO that uses win32 fs APIs. Research Review. youtu.be/msY6UvKfL68
A . is all you need! 🔥 RCE in Copilot for Visual Studio and SSMS. A trailing dot added to a config filename bypasses Copilot's security controls, leading to remote code execution in Visual Studio and SQL Server Management Studio. embracethered.com/blog/posts…
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Mizu gets in the IM sink like some dishes and pulls off a crazy chain. Incredibly deep dive into a hardened application leading to critical impact. Research Review. youtu.be/rbvuET43snY
I'm happy that my first article as part of the @SLCyberSec research team is finally out! 😁 It covers an interesting ImageMagick race condition that I found back in June, which, combined with a polyglot payload, allowed me to achieve file read/RCE on Discourse. This should resonate with those who've seen the recent @HacktronAI research. I hope you'll enjoy it! 👇
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We got RCE in VS Code before the "do you trust this workspace?" prompt even loaded. The full workshop from DEF CON's Bug Bounty Village is now live. Nick Copi (@7urb01) tears apart a vulnerable AI coding extension in a hands-on hack-along. Watch: youtu.be/spLPuvBQqlM
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It's kind of weird how numb we are now to bugs like this that would have elicited so much more excitement even a year ago. Great impact. Research Review. youtu.be/XdupePzpfNc
On July 25, we hacked OpenAI. Two bugs let us take over ChatGPT/Codex accounts of OpenAI employees (+some unaffiliated users) and reach connected services: Outlook, Slack, GitHub, etc. We proved it with a PR in OpenAI’s internal codebase . It took us <72h. 🧵
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I missed this episode of Detective Woltjer vs mysterious browser behaviors because of DefCon, but I'm glad I was able to catch a rerun later. 🔍 Research review. youtu.be/TpXccQbOb48
We know you're all hyped with DEF CON stuff but here's one more thing to get excited about: @J0R1AN just released a new research over at the Critical Research Lab! And this time it was inspired by a discussion we had on our discord, go check it out! lab.ctbb.show/research/solvi…
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More classic Azure bangers. Research Review. youtu.be/cI-xxAlh2fg
A vulnerability in Azure? How about 3 of those? Uncovering 2 SSRFs + a file upload path traversal I discovered in the Azure API Management service. Attackers could send requests from the service’s proxies, access internal Azure assets, deny service and upload malicious files🧵
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It's really cool to see a concrete example of a modern indirect prompt injection guardrail bypass that is technical in nature and doesn't just come from saying magic words. Also this writeup is really good and the exploit chain rules. Research Review. youtu.be/vdxCdFe1bcU
Breaking Claude Code Opus 5 Auto Mode 🔥 1/ Here is a somewhat hilarious attack chain that hijacks Claude Code Opus 5 for a full system compromise via a website Hint: Security invariants are not optional 🧵
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Some people's favorite shape is a circle. Others, a square. Mine is the shape of cross tenant cloud bugs. Research Review. youtu.be/XTuk3ZTs_So
🚨 CosmosEscape: We found a single key that unlocked every database in Azure CosmosDB One key >> Platform-wide impact. Microsoft fully remediated the issue. ✅ Read the full research and see how Wiz uncovered CosmosEscape: wiz.io/blog/cosmosescape-tak…
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Can't wait to see all the crazy new ways to achieve security impact with internet breaking techniques that get discovered by forking the approaches shared here. Research Review. youtu.be/WQc46XXuKdI
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Some people are just looking for an excuse to talk about JavaScript sandboxes at all times. I'm some people. Research Review. youtu.be/-de7dxdkacU
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I'm not sure which is crazier, the icy chain here or the fact that the prompt and setup was shared so freely that I can just toss at other hardened targets and get RCE. Research review. youtu.be/BNm_jF4jDwc
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Don't miss the workshop "Hacking IDE Extensions - VSCode Workshop" by Nick Copi (@7urb01) on Fri, Aug 7 at 10:30am inside the Village. Read more at bugbountydefcon.com/agenda #BugBounty #DEFCON34
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These kinds of bugs are cool because such small discrepancies and have such huge impact. Research review. youtu.be/uzBPzMQiAE8
MAD Bugs: My Cousin Vinyl (CVE-2026-50052) So the story went like this: Squid was bleeding from a 29-year-old heap overread in her default config. Naturally, she did the only sensible thing: she called her cousin, Vinyl. It turns out Vinyl also had a family problem of his own. blog.calif.io/p/mad-bugs-my-…
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Such a fun bug class to end up universal via an interesting delivery mechanism. Really liked the clever tricks used to force a working PoC without reusing precanned solutions. Research Review. youtu.be/9MeXS_b_Ahw
Pleased to publish a browser-related research paper (w/@inzo____) titled: One trigram at a time: XSLeak via Universal CSS Injection and DoS in Opera (GX) The title speaks for itself. Enjoy the read! zhero-web-sec.github.io/rese…
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We're excited to announce that Nick Copi (@7urb01) will be speaking at the Bug Bounty Village during DEF CON 34! Stay tuned for more details on their talk, you won't want to miss it. #BugBounty #DEFCON #BBV #BugBountyVillage
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That’s a wrap on our Tokyo Live Hacking Event with @Salesforce 🇯🇵 In the agentic enterprise era, collaboration matters more than ever. 10+ years of partnership. One shared mission: stronger security for the AI era. Until next time. #TogetherWeHitHarder
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My misplaced PHPrejudice had me guess wrong on the root cause of this one. Research Review. youtu.be/nrqcP5ERX1k
On June 10th, we announced a critical auth bypass in phpBB, now CVE-2026-48611. Here's the technical followup with exploit scenarios and how to detect it. All it takes is one unauthenticated request to log in as any user, admin included, on a default phpBB install, no password required. Aikido Attack caught this on a routine run. We reported it June 2nd, and phpBB shipped a fix four days later in version 3.3.17. If you haven't upgraded yet, do it now.
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