A private BitTorrent tracker is a web application like any other: authentication, REST API, WebSockets for real-time chat, CDN in front. The difference with a standard SaaS? Members share sensitive data — download ratio, activity history, sometimes their public IP address embedded in .torrent files. A data leak has real consequences. Methodology — 5 phases A structured web pentest always follows the same rhythm. In brief: Phase Goal Tools 1. Reconnaissance Map the attack surface without touching the target crt.sh, Shodan, Whois, Certificate Transparency 2. Scanning Identify open ports, services, versions nmap (carefully, behind Cloudflare) 3. Enumeration Discover endpoints, parameters, features Browser DevTools, JS analysis, ffuf 4. Exploitation Confirm and exploit discovered vulnerabilities Burp Suite, Python scripts, Playwright 5. Report Document findings, impact, remediation Markdown + CVSS scoring Phase 1 (recon) is the most important and the most underestimated.…