grafana -- LDAP and OAuth login vulnerability

Grafana Labs reports:

On the 20th of August at 1800 CEST we were contacted about a
potential security issue with the “remember me” cookie Grafana
sets upon login. The issue targeted users without a local Grafana
password (LDAP & OAuth users) and enabled a potential attacker
to generate a valid cookie knowing only a username.
All installations which use the Grafana LDAP or OAuth
authentication features must be upgraded as soon as possible. If
you cannot upgrade, you should switch authentication mechanisms
or put additional protections in front of Grafana such as a
reverse proxy.