A Guide To Subdomain Takeovers 2.0

This report is a practical, hands-on guide to subdomain takeovers: it explains how takeovers occur (DNS CNAMEs pointing to deleted third‑party resources), how to identify vulnerable services (community lists and testing), methods for enumerating and automating detection (active/passive enumeration and Nuclei templates), responsible proof‑of‑concept practices, and the security impacts and attack vectors (cookie scope, CORS, OAuth redirect abuse, CSP, CSRF) along with mitigation recommendations such as domain ownership verification.