medium.com/tag/ctf-writeup· Oct 20, 2026· by WynnThe O365 Intrusion | TryHackMe CTF WriteupOpen Original Article ↗📋 Copy Report☆ Save BookmarkContinue reading on Medium »🎯 Vulnerability: Web Security Vulnerability💡 Defense Fix: Implement strict input validation, contextual output encoding, and enforce least-privilege authorization controls.#ctf-writeup#tryhackme#tryhackme-writeup#cybersecurity#ctf