CVE-2021-39226

Grafana is an open source data visualization platform. In affected versions
unauthenticated and authenticated users are able to view the snapshot with
the lowest database key by accessing the literal paths:
/dashboard/snapshot/:key, or /api/snapshots/:key. If the snapshot
“public_mode” configuration setting is set to true (vs default of false),
unauthenticated users are able to delete the snapshot with the lowest
database key by accessing the literal path:
/api/snapshots-delete/:deleteKey. Regardless of the snapshot “public_mode”
setting, authenticated users are able to delete the snapshot with the
lowest database key by accessing the literal paths: /api/snapshots/:key, or
/api/snapshots-delete/:deleteKey. The combination of deletion and viewing
enables a complete walk through all snapshot data while resulting in
complete snapshot data loss. This issue has been resolved in versions 8.1.6
and 7.5.11. If for some reason you cannot upgrade you can use a reverse
proxy or similar to block access to the literal paths: /api/snapshots/:key,
/api/snapshots-delete/:deleteKey, /dashboard/snapshot/:key, and
/api/snapshots/:key. They have no normal function and can be disabled
without side effects.

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