Fixes CVE-2021-39226, see https://grafana.com/blog/2021/10/05/grafana-7.5.11-and-8.1.6-released-with-critical-security-fix/ also see https://grafana.com/docs/grafana/latest/whatsnew/whats-new-in-v7-5/ for changes since 7.4. A brave soul should update this monster to 8.2..