Is CVE-2021-28148 in the CISA KEV catalog?

No. CVE-2021-28148 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-28148?

CVE-2021-28148 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-28148?

CVE-2021-28148 has an EPSS score of 3.50% (88th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-28148?

Upgrade GrafanaEnterprise to 7.3.10 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2021-28148

HIGHEPSS 88th pctl

7.5

CVSS v3

NVD

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.

CWE-306Missing Authentication for Critical Function

How to fix

Remediation Available

GrafanaEnterpriseWindows application

Affected:7.0.0 7.3.10Fixed in:7.3.10Grafana Labs

Affected:6.0.0 6.7.6Fixed in:6.7.6Grafana Labs

Affected:7.4.0 7.4.5Fixed in:7.4.5Grafana Labs

GrafanaOSSWindows application

Affected:6.0.0 6.7.6Fixed in:6.7.6Grafana Labs

Affected:7.4.0 7.4.5Fixed in:7.4.5Grafana Labs

Affected:7.0.0 7.3.10Fixed in:7.3.10Grafana Labs

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

3.50%probability of exploitation in 30 days

88thpercentile

Elevated risk: more likely to be exploited than 88% of all known CVEs.

References

Vendor Advisory6

Third-Party Advisory2

Related Vulnerabilities

Other CWE-306 (Missing Authentication for Critical Function) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2017-10271	High	7.5	100%	KEV + Ransom	-
CVE-2023-42793	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2025-3248	Critical	9.8	100%	KEV	Fix
CVE-2022-1388	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2021-37415	Critical	9.8	100%	KEV	-
CVE-2023-21839	High	7.5	100%	KEV	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.