In Apache Traffic Control Traffic Ops prior to 6.1.0 or 5.1.6, an unprivileged user who can reach Traffic Ops over HTTPS can send a specially-crafted POST request to /user/login/oauth to scan a port of a server that Traffic Ops can reach.
https://github.com/advisories/GHSA-wp47-9r3h-xfgq
https://lists.apache.org/thread/lsrd2mqj29vrvwsh8g0d560vvz8n126f