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7 min readIDOR: How Changing One Number in a URL Can Expose Everyone's Data 🔢💀
You built a REST API, you're feeling great. Then a hacker changes /api/orders/1001 to /api/orders/1002 and reads someone else's order. Congrats, you just shipped an IDOR vulnerability — the bug that launched a thousand data breaches.
Mar 25, 2026