CVE-2023-6156Network attack vector

Monitoring-core command execution via newline injection

Published Nov 22, 2023 · Updated Aug 2, 2024

Livestatus injection in Checkmk availability timelines allows remote authenticated users to execute arbitrary monitoring-core commands. The availability-timeline WebUI passes relevant parameters containing newline delimiters to the Livestatus core, so appended lines are parsed as additional commands. An authorized WebUI account is required, and the vendor has not identified which core commands were demonstrated or their exact operational effects.

CVSS severity7.6
High
EPSS probability0.86%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Livestatus injection in Checkmk availability timelines allows remote authenticated users to execute arbitrary monitoring-core commands. The availability-timeline WebUI passes relevant parameters containing newline delimiters to the Livestatus core, so appended lines are parsed as additional commands. An authorized WebUI account is required, and the vendor has not identified which core commands were demonstrated or their exact operational effects.

The record

CVE
CVE-2023-6156
Published
Nov 22, 2023
Updated
Aug 2, 2024
Vendor
Checkmk GmbH
Product
Checkmk
Classifications
CWE-140
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 22, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record 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=2.0.0 <=2.0.0p39
  2. Affected versionversion=2.1.0 <2.1.0p37
  3. Affected versionversion=2.2.0 <2.2.0p15

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Checkmk GmbH · Checkmkversion=2.0.0 <=2.0.0p39; version=2.1.0 <2.1.0p37; version=2.2.0 <2.2.0p15

Published CVSS scores

7.6Checkmk GmbHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-140Improper Neutralization of Delimiters

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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