JupyterHub 1.1.0 allows CSRF in the admin panel via a request that lacks an _xsrf field, as demonstrated by a /hub/api/user request (to add or remove a user account).
{
"cpes": [
"cpe:2.3:a:jupyter:jupyterhub:1.1.0:-:*:*:*:*:*:*",
"cpe:2.3:a:jupyter:jupyterhub:*:*:*:*:*:*:*:*"
],
"severity": "Medium"
}