CVE-2023-22348Network attack vector

Host configuration disclosure via missing contact-group check

Published May 17, 2023 · Updated Jan 22, 2025

Authorization bypass in Checkmk 2.1.0 through 2.1.0p27 and 2.2.0b1 through 2.2.0b7 allows remote authenticated users to read host configurations. The REST API GET handler for /objects/host_config/<host_name> serves a configuration without checking whether the requester belongs to that host's contact group. Any authenticated account can therefore read configuration for hosts outside its assigned contact groups, with no reported ability to modify those hosts.

CVSS severity4.3
Medium
EPSS probability0.59%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Checkmk 2.1.0 through 2.1.0p27 and 2.2.0b1 through 2.2.0b7 allows remote authenticated users to read host configurations. The REST API GET handler for /objects/host_config/<host_name> serves a configuration without checking whether the requester belongs to that host's contact group. Any authenticated account can therefore read configuration for hosts outside its assigned contact groups, with no reported ability to modify those hosts.

The record

CVE
CVE-2023-22348
Published
May 17, 2023
Updated
Jan 22, 2025
Vendor
Checkmk GmbH
Product
Checkmk
Classifications
CWE-285, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 17, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 22, 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=2.1.0 <2.1.0p28
  2. Affected versionversion=2.2.0 <2.2.0b8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Checkmk GmbH · Checkmkversion=2.1.0 <2.1.0p28; version=2.2.0 <2.2.0b8

Published CVSS scores

4.3Checkmk GmbHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-285Improper Authorization
T1190Exploit Public-Facing Application

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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