ThinkDashboard is a self-hosted bookmark dashboard built with Go and vanilla JavaScript. Versions 0.6.7 and below contain a Blind Server-Side Request Forgery (SSRF) vulnerability, in its /api/ping?url= endpoint. This allows an attacker to make arbitrary requests to internal or external hosts. This can include discovering ports open on the local machine, hosts on the local network, and ports open on the hosts on the internal network. This issue is fixed in version 0.6.8.
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.