CVE-2025-58122Network attack vector

Unauthorized template access via missing permission checks

Published Nov 18, 2025 · Updated Nov 18, 2025

Improper permission validation in Checkmk 2.4.0 before 2.4.0p16 allows remote authenticated users to read or modify notification templates. The check_mk/api/1.0/objects/configuration_entity/* endpoints accept requests without enforcing the required notification_plugin.* permissions. A low-privileged account is sufficient in the default configuration to obtain sensitive template data or make unauthorized template changes.

CVSS severity5.3
Medium
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper permission validation in Checkmk 2.4.0 before 2.4.0p16 allows remote authenticated users to read or modify notification templates. The check_mk/api/1.0/objects/configuration_entity/* endpoints accept requests without enforcing the required notification_plugin.* permissions. A low-privileged account is sufficient in the default configuration to obtain sensitive template data or make unauthorized template changes.

The record

CVE
CVE-2025-58122
Published
Nov 18, 2025
Updated
Nov 18, 2025
Vendor
Checkmk GmbH
Product
Checkmk
Classifications
CWE-280, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 18, 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=2.4.0 <2.4.0p16

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Checkmk GmbH · Checkmkversion=2.4.0 <2.4.0p16

Published CVSS scores

5.3Checkmk GmbHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/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.

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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-280Improper Handling of Insufficient Permissions or Privileges
T1190Exploit Public-Facing Application

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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