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From exporting reports to accessing AWS metadata, internal APIs, and cloud secrets. Join my deep dive into exploiting a blind SSRF in a PDF service, chaining vulnerabilities into a critical infrastructure breach. Full PoC included. 🎻
You know that feeling when you’re trying to print a document and the printer jams, but then you accidentally discover the secret admin menu that lets you print free copies for life? 🖨️ That was me — but instead of a printer, it was a multi-million dollar company’s PDF export service, and instead of free copies, I got full access to their internal cloud. My roommate thought I was having too much coffee when I started laughing maniacally at a loading bar.
It all started on a lazy Wednesday. Coffee in hand ☕, I was testing a fancy financial web application — let’s call them wealthsecure.com. They had this sleek "Export to PDF" feature on every report page. I'd click it, and a few seconds later, a beautiful PDF would download. Pretty normal, right?
But then I noticed something odd in the network tab…