Subdomain takeover.

A record pointing at a cancelled service can be claimed by someone else. One page per service.

Guides

A record pointing at a cancelled service can be claimed by someone else. How to confirm it and remove it.

A subdomain pointing at a deprovisioned service is a takeover risk. How it happens, why it matters and how to close it.

Quick answers

A record pointing at a service you no longer use. If that service releases the name, someone else can claim it and serve…

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