High severity · published Mar 22, 2021
CVE-2021-28148
One of the usage insights HTTP API endpoints in Grafana Enterprise 6.x before 6.7.6, 7.x before 7.3.10, and 7.4.x before 7.4.5 is accessible without any authentication
7.5
CVSS
3.5%
EPSS
No
On KEV
Description
One of the usage insights HTTP API endpoints in Grafana Enterprise 6.x before 6.7.6, 7.x before 7.3.10, and 7.4.x before 7.4.5 is accessible without any authentication. This allows any unauthenticated user to send an unlimited number of requests to the endpoint, leading to a denial of service (DoS) attack against a Grafana Enterprise instance.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.5% · higher than 89% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GR
Grafana · Grafana
6.0.0 before 6.7.6; 7.0.0 before 7.3.10; 7.4.0 before 7.4.5 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-28148
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-28148
Vendor Advisory
https://community.grafana.com/t/grafana-enterprise-6-7-6-7-3-10-and-7-4-5-security-update/44724
Release Notes
https://community.grafana.com/t/release-notes-v6-7-x/27119
Release Notes
https://grafana.com/blog/2021/03/18/grafana-6.7.6-7.3.10-and-7.4.5-released-with-important-security-fixes-for-grafana-enterprise/
Release Notes
https://grafana.com/docs/grafana/latest/release-notes/release-notes-7-3-10/
Release Notes
https://grafana.com/docs/grafana/latest/release-notes/release-notes-7-4-5/
Product
https://grafana.com/products/enterprise/
More from Grafana
7.5
CVE-2021-43798
Grafana path traversal
7.3
CVE-2021-39226
Snapshot authentication bypass in grafana
9.9
CVE-2025-11539
Arbitrary Code Execution in Grafana Image Renderer Plugin
9.8
CVE-2025-41115
Incorrect privilege assignment
9.8
CVE-2023-3128
Grafana is validating Azure AD accounts based on the email claim