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Executive Summary On one of our AWS EC2 servers running a Next.js development environment, we discovered an active exploitation of the React2Shell vulnerability (CVE-2025-55182 / CVE-2025-66478). The attacker successfully installed cryptocurrency min...

As an authorized junior developer I was assigned a pentesting task. Something new with not much expertise, however problem-solving from computer science field got my back. Spoiler: the vulnerability was already patched. I just didn't know it yet. Th...

After twenty-three days of exploits, investigations, and saving Wareville from disaster, Advent of Cyber reaches its final challenge. There are no flashy tools left. No browser. No Burp Suite. Just a terminal, raw HTTP, and the skills we’ve built thr...
