Ghost is a Node.js content management system. From 1.18.0 until 6.27.0, an SSRF vulnerability in the webhooks feature allowed staff users to probe internal hosts from the Ghost server. This issue is fixed in version 6.27.0.
Weakness
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.