CVE-2023-3128Network attack vector

Account takeover via mutable Azure AD email claims

Published Jun 22, 2023 · Updated Feb 13, 2025

Authentication bypass in Grafana and Grafana Enterprise allows remote attackers to take over user accounts via multi-tenant Azure AD OAuth. The OAuth user lookup trusts the mutable, non-unique Azure AD email claim instead of the identity provider's unique user ID. Exposure requires a multi-tenant Azure AD application without allowed_groups restrictions; successful exploitation grants control of the matched Grafana account and its accessible data.

CVSS severity9.4
Critical
EPSS probability4.00%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Grafana and Grafana Enterprise allows remote attackers to take over user accounts via multi-tenant Azure AD OAuth. The OAuth user lookup trusts the mutable, non-unique Azure AD email claim instead of the identity provider's unique user ID. Exposure requires a multi-tenant Azure AD application without allowed_groups restrictions; successful exploitation grants control of the matched Grafana account and its accessible data.

The record

CVE
CVE-2023-3128
Published
Jun 22, 2023
Updated
Feb 13, 2025
Vendor
Grafana Labs
Product
Grafana
Classifications
CWE-290, T1078
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 22, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.7.0 <8.5.27
  2. Affected versionversion=9.2.0 <9.2.20
  3. Affected versionversion=9.3.0 <9.3.16
  4. Affected versionversion=9.4.0 <9.4.13
  5. Affected versionversion=9.5.0 <9.5.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Grafana Labs · Grafanaversion=6.7.0 <8.5.27; version=9.2.0 <9.2.20; version=9.3.0 <9.3.16; version=9.4.0 <9.4.13; version=9.5.0 <9.5.4
Grafana Labs · Grafana Enterpriseversion=6.7.0 <8.5.27; version=9.2.0 <9.2.20; version=9.3.0 <9.3.16; version=9.4.0 <9.4.13; version=9.5.0 <9.5.4

Published CVSS scores

9.4Grafana LabsCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-290Authentication Bypass by Spoofing
T1078Valid Accounts

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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