// Hacker Noon · 15 February 2026

CTF Walkthrough: Exploiting Cookie-Based Privilege Escalation in Power Cookie

In picoCTF’s “Power Cookie” challenge, a website relies on a client-side isAdmin cookie to determine user privileges. By changing its value from 0 to 1, users can escalate access and retrieve the flag—highlighting why authentication and authorization must always be validated on the server, not trust...

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