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9.3
CRITICAL CVSS 4.0
CVE-2025-39666
omd: Local privilege escalation when executing omd commands as root
Overview
Description

Local privilege escalation in Checkmk 2.2.0 (EOL), Checkmk 2.3.0 before 2.3.0p46, Checkmk 2.4.0 before 2.4.0p25, and Checkmk 2.5.0 (beta) before 2.5.0b3 allows a site user to escalate their privileges to root, by manipulating files in the site context that are processed when the `omd` administrative command is run by root.

Details
INFO

Published Date :

April 7, 2026, 1:16 p.m.

Last Modified :

April 14, 2026, 3:39 p.m.

Remotely Exploit :

No

Source :

[email protected]
Impact
Affected Products

The following products are affected by CVE-2025-39666 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Checkmk checkmk
: Total Affected Vendor : 1 | Products : 1
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH [email protected]
CVSS 4.0 CRITICAL [email protected]
Solution
Update Checkmk to a patched version to fix privilege escalation vulnerability.
  • Update Checkmk to version 2.3.0p46 or later.
  • Update Checkmk to version 2.4.0p25 or later.
  • Update Checkmk 2.5.0 beta to version 2.5.0b3 or later.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-39666.

URL Resource
https://checkmk.com/werk/18891 Vendor Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-39666 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-39666 weaknesses.

CAPEC-38: Leveraging/Manipulating Configuration File Search Paths Leveraging/Manipulating Configuration File Search Paths CAPEC-175: Code Inclusion Code Inclusion CAPEC-201: Serialized Data External Linking Serialized Data External Linking CAPEC-228: DTD Injection DTD Injection CAPEC-251: Local Code Inclusion Local Code Inclusion CAPEC-252: PHP Local File Inclusion PHP Local File Inclusion CAPEC-253: Remote Code Inclusion Remote Code Inclusion CAPEC-263: Force Use of Corrupted Files Force Use of Corrupted Files CAPEC-538: Open-Source Library Manipulation Open-Source Library Manipulation CAPEC-549: Local Execution of Code Local Execution of Code CAPEC-640: Inclusion of Code in Existing Process Inclusion of Code in Existing Process CAPEC-660: Root/Jailbreak Detection Evasion via Hooking Root/Jailbreak Detection Evasion via Hooking CAPEC-695: Repo Jacking Repo Jacking CAPEC-698: Install Malicious Extension Install Malicious Extension

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-39666 vulnerability anywhere in the article.

  • Daily CyberSecurity
Root Access at Risk: Critical Nix Sandbox Escape Overwrites Sensitive System Files

A severe security vulnerability has been identified in the Nix package manager, a tool celebrated by the Linux and Unix communities for making package management reliable and reproducible. Tracked as ... Read more

Published Date: Apr 10, 2026 (2 weeks, 6 days ago)
  • Daily CyberSecurity
Critical Privilege Escalation in Checkmk: Root Access at Risk

A critical-severity security vulnerability has been identified in the Checkmk monitoring platform, potentially allowing local users to seize full control of the host system. The flaw, tracked as CVE-2 ... Read more

Published Date: Apr 10, 2026 (2 weeks, 6 days ago)

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2025-39666 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Apr. 14, 2026

    Action Type Old Value New Value
    Added CVSS V3.1 AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
    Added CPE Configuration OR *cpe:2.3:a:checkmk:checkmk:2.2.0:i1:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:b2:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:b1:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:b3:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:-:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:b4:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:b5:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:b6:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:b7:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:b8:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p1:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p2:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p3:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p4:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p6:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p7:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p5:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p8:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p9:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p10:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p11:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p12:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p13:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p14:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p15:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p16:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p17:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p1:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p2:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p3:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p4:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p5:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p6:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p7:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p8:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p9:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p19:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p20:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p21:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p22:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p23:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p24:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p25:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p26:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p27:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p28:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p29:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p30:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p18:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p10:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p31:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:-:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p13:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p11:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p12:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p15:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p14:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p33:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p17:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p16:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p35:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p34:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p32:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p38:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p37:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p36:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:b2:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:b3:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:b1:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:b4:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:b5:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:b6:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p20:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p21:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p18:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p19:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p22:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p39:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p23:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p24:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p25:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p26:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p40:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p27:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p28:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p29:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p41:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p30:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p31:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.4.0:b1:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.4.0:b2:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.4.0:b3:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.4.0:b4:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.4.0:b5:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.4.0:b6:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.4.0:-:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p42:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p43:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p32:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p33:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p34:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.4.0:p1:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.4.0:p2:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.4.0:p3:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.4.0:p4:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.4.0:p5:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.4.0:p10:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.4.0:p11:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.4.0:p12:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.4.0:p13:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.4.0:p14:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.4.0:p15:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.4.0:p6:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.4.0:p7:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.4.0:p8:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.4.0:p9:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p35:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p36:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p37:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p38:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p39:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p40:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p44:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p45:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p46:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.2.0:p47:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.4.0:p16:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.4.0:p17:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.4.0:p18:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p41:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p42:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.4.0:p19:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.4.0:p20:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.4.0:p21:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.4.0:p22:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.5.0:b1:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.4.0:p23:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.4.0:p24:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p43:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p44:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.3.0:p45:*:*:*:*:*:* *cpe:2.3:a:checkmk:checkmk:2.5.0:b2:*:*:*:*:*:*
    Added Reference Type Checkmk GmbH: https://checkmk.com/werk/18891 Types: Vendor Advisory
  • New CVE Received by [email protected]

    Apr. 07, 2026

    Action Type Old Value New Value
    Added Description Local privilege escalation in Checkmk 2.2.0 (EOL), Checkmk 2.3.0 before 2.3.0p46, Checkmk 2.4.0 before 2.4.0p25, and Checkmk 2.5.0 (beta) before 2.5.0b3 allows a site user to escalate their privileges to root, by manipulating files in the site context that are processed when the `omd` administrative command is run by root.
    Added CVSS V4.0 AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
    Added CWE CWE-426
    Added CWE CWE-829
    Added Reference https://checkmk.com/werk/18891
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 9.3
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability
Base CVSS Score: 7.3
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact