---
id: CVE-2025-58124
title: >-
  Improper Certificate Validation in Checkmk Exchange plugin check-mk-api allows
  attackers in MitM position to intercept traffic.
summary: >-
  Improper Certificate Validation in Checkmk Exchange plugin check-mk-api allows
  attackers in MitM position to intercept traffic.
severity: medium
cvss: 4.8
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-295
vendor: heinlein-support
product: check_mk_python_api
affected:
  - check_mk_python_api
published: '2025-08-28'
updated: '2026-09-26'
sourceUpdated: '2026-09-26T00:10:00.127'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-58124'
references:
  - url: 'https://exchange.checkmk.com/p/check-mk-api'
    label: security@checkmk.com
tags:
  - nvd
epss: 0.00109
epssPercentile: 0.01123
ingestedAt: '2026-09-26T00:22:39.881Z'
---

## Overview

Improper Certificate Validation in Checkmk Exchange plugin check-mk-api allows attackers in MitM position to intercept traffic.

## Affected

- `check_mk_python_api`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.