CVE-2022-39229Network attack vector

Login denial via username-email identity collision

Published Oct 13, 2022 · Updated Apr 23, 2025

Improper authentication in Grafana 8.5.0 through 8.5.13 and 9.0.0 through 9.1.7 allows remote authenticated users to block another user's login. The GetUserByLogin lookup accepts either identifier and resolves a victim's email to the colliding username, so password verification targets the attacker's account. An authenticated user able to register that username can deny the victim access through basic authentication without affecting other accounts.

CVSS severity4.3
Medium
EPSS probability0.89%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in Grafana 8.5.0 through 8.5.13 and 9.0.0 through 9.1.7 allows remote authenticated users to block another user's login. The GetUserByLogin lookup accepts either identifier and resolves a victim's email to the colliding username, so password verification targets the attacker's account. An authenticated user able to register that username can deny the victim access through basic authentication without affecting other accounts.

The record

CVE
CVE-2022-39229
Published
Oct 13, 2022
Updated
Apr 23, 2025
Vendor
Grafana Labs
Product
Grafana
Classifications
CWE-287, T1531
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 13, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 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=>= 8.5.0, < 8.5.14
  2. Affected versionversion=>= 9.0.0, < 9.1.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Grafana Labs · Grafanaversion=>= 8.5.0, < 8.5.14; version=>= 9.0.0, < 9.1.8

Published CVSS scores

5.1GitHub Advisory DatabaseCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
4.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
T1531Account Access Removal

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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