Grafana 2.x, 3.x, and 4.x before 4.6.4 and 5.x before 5.2.3 allows authentication bypass because an attacker can generate a valid "remember me" cookie...

References

• advisory http://www.securityfocus.com/bid/105184
• advisory https://access.redhat.com/errata/RHSA-2018:3829
• advisory https://access.redhat.com/errata/RHSA-2019:0019
• patch https://grafana.com/blog/2018/08/29/grafana-5.2.3-and-4.6.4-released-with-important-security-fix/