What’s Vulnerable › Vulnerabilities

CVE-2021-28148

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-03-22 · updated 2026-06-17
• Weakness: CWE-306

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.

Affected products

• Grafana: from 6.0.0 before 6.7.6; from 7.0.0 before 7.3.10; from 7.4.0 before 7.4.5 — fixed in 6.7.6, 7.3.10, 7.4.5

How to fix

Upgrade to a fixed version: Grafana 6.7.6, 7.3.10, 7.4.5. Check the vendor advisory for mitigations.

References

• https://community.grafana.com/t/grafana-enterprise-6-7-6-7-3-10-and-7-4-5-security-update/44724
• https://community.grafana.com/t/release-notes-v6-7-x/27119
• 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/
• https://grafana.com/docs/grafana/latest/release-notes/release-notes-7-3-10/
• https://grafana.com/docs/grafana/latest/release-notes/release-notes-7-4-5/
• https://grafana.com/products/enterprise/
• https://security.netapp.com/advisory/ntap-20210430-0005/
• https://www.openwall.com/lists/oss-security/2021/03/19/5
• https://community.grafana.com/t/grafana-enterprise-6-7-6-7-3-10-and-7-4-5-security-update/44724
• https://community.grafana.com/t/release-notes-v6-7-x/27119
• 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/
• https://grafana.com/docs/grafana/latest/release-notes/release-notes-7-3-10/

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