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Most hunters scroll past cache-related behavior, thinking:

“This is CDN stuff… not my problem.”

“That assumption has paid attackers thousands of dollars.”

This post dives into Web Cache Deception — a vulnerability that doesn’t exploit your code, but how your application is interpreted by caching layers.

And when it hits, it leaks authenticated user data to the public.

🧠 What Is Web Cache Deception (In Plain English)

Web Cache Deception happens when:

-> A user is logged in

-> They request a dynamic, authenticated page

-> The request looks like a static file

-> A cache (CDN / reverse proxy) stores it

-> Anyone can later access that cached response without authentication