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Alexander

@appcheckwizard.bsky.social

Web developer/QA. He/Him.

Alexander @appcheckwizard.bsky.social · 14/04/2026

A cleanup script deleted the wrong S3 bucket. An attacker claimed it within minutes and served illegal iGaming content through a corporate subdomain until mitigations were in place. Slides from my talk about Subdomain Takeover @ #AtlSecCon2026 are up! www.appcheckwizard.com/talks/2026/a...

appcheckwizard.com

A Tale of Subdomain Takeover | Fortune Tiger: A Tale of Subdomain Takeover - AtlSecCon 2026

A cleanup script gone wrong deleted a critical S3 redirection bucket, allowing an attacker to hijack a corporate subdomain and serve a Fortune Tiger iGaming content to all visitors.

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Alexander @appcheckwizard.bsky.social · 01/04/2026

I don't usually do front-end. But... there are exceptions. A challenge to build a responsive page from a design mockup - HTML, pure CSS and vanilla JavaScript. No Bootstrap, no Tailwind. It went through a full cycle: build, test, refactor. Feedback welcome. Repo: github.com/alexandersch...

alexanderscheibler.github.io

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