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Fencer Vulns
high 7.5

CVE-2021-27358 in the critical feed json

Denial of service in Grafana

published 2021-03-18 5 y ago modified 2026-09-08 2 mo ago also BIT-grafana-2021-27358 , EUVD-2022-1033 , GHSA-h5rh-w6vm-9ghc

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
83.0%
EPSS 83.0% chance of exploitation in 30 days, percentile 99.6%
public exploits
0
none known, plus a Nuclei check

Summary

The snapshot feature in Grafana 6.7.3 through 7.4.1 can allow an unauthenticated remote attackers to trigger a Denial of Service via a remote API call if a commonly used configuration is set.

Patch / fix

  • go github.com/grafana/grafana 7.4.2
  • bitnami grafana 7.4.2
  • grafana RHEL 8 7.5.9-4.el8

red hat advisories RHSA-2021:4226

  • grafana Manager Client Tools 15 7.5.7-1.21.1
  • kibana OpenStack Cloud Crowbar 8, OpenStack Cloud 8, HPE Helion OpenStack 8 4.6.6-3.9.2
  • grafana OpenStack Cloud Crowbar 8, OpenStack Cloud 8, HPE Helion OpenStack 8 6.7.4-4.18.2
  • cassandra OpenStack Cloud Crowbar 8, OpenStack Cloud 8, HPE Helion OpenStack 8 3.11.10-5.3.5
  • python-py OpenStack Cloud Crowbar 8, OpenStack Cloud 8, HPE Helion OpenStack 8 1.4.34-3.3.3
  • crowbar-core OpenStack Cloud Crowbar 8 5.0+git.1622489449.a8e60e238-3.50.4
  • python-Django OpenStack Cloud Crowbar 8, OpenStack Cloud 8, HPE Helion OpenStack 8 1.11.29-3.25.3
  • ardana-cobbler OpenStack Cloud 8, HPE Helion OpenStack 8 8.0+git.1614096566.e8c2b27-3.44.3

suse advisories SUSE-SU-2021:2660-1SUSE-SU-2021:2554-1SUSE-SU-2021:1963-1SUSE-SU-2021:1962-1

  • grafana openSUSE Leap 15.2 7.5.7-lp152.2.16.1
  • grafana openSUSE Leap 15.3 7.5.7-3.12.1

opensuse advisories openSUSE-SU-2021:1148-1openSUSE-SU-2021:2662-1

  • grafana AlmaLinux 8 7.5.9-4.el8

almalinux advisories ALSA-2021:4226

  • grafana Rocky Linux 8 7.5.9-4.el8

rocky linux advisories RLSA-2021:4226

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-27358 updated cvss 7.5

grafana: snapshot feature allow an unauthenticated remote attacker to trigger a DoS via a remote API call

  • Red Hat OpenShift Service Mesh 1 servicemesh-grafana, servicemesh-grafana-prometheus
    affected: no fix planned “Out of support scope”
  • Red Hat OpenShift Service Mesh 2.0 servicemesh-grafana, servicemesh-grafana-prometheus Red Hat Advanced Cluster Management for Kubernetes 2 acm-grafana-rhel8
    affected: no fix available
  • Red Hat Ceph Storage 2 grafana, acm-grafana-rhel8
    affected: no fix planned “Out of support scope”
  • Red Hat Ceph Storage 3 grafana, acm-grafana-rhel8, grafana-container
    affected: no fix available, no fix planned “Out of support scope”
  • Red Hat Ceph Storage 4 rhceph/rhceph-4-dashboard-rhel8 Red Hat OpenShift Container Platform 3.11 openshift3/grafana Red Hat OpenShift Container Platform 4 openshift4/ose-grafana Red Hat Storage 3 grafana, acm-grafana-rhel8
    affected: no fix available “Fix deferred”
  • Red Hat Enterprise Linux AppStream (v. 8) grafana 7.5.9-4.el8
    fixed: vendor fix RHSA-2021:4226
  • Red Hat Enterprise Linux 9 grafana, grafana-selinux, acm-grafana-rhel8
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

83.04% chance of exploitation in the next 30 days, higher than 99.6% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • Nuclei template Grafana Unauthenticated Snapshot Creation nuclei detection template

CVSS scores

assigned by version score vector
GitHub 3.1 8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H/E:U/RL:O/RC:R
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
go github.com/grafana/grafana
>=6.7.3, <7.4.2
7.4.2
bitnami grafana
>=6.7.3, <7.4.2
7.4.2

Classification

Weakness
  • CWE-306 Missing Authentication for Critical Functionality
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.