Checkmk up to 2.1.0/2.2.0/2.3.0p40/2.4.0p15 mk_inotify Plugin permission assignment

CVSS Meta Temp Score
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CTI Interest Score
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4.8$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in Checkmk up to 2.1.0/2.2.0/2.3.0p40/2.4.0p15. Affected by this vulnerability is an unknown functionality of the component mk_inotify Plugin. Such manipulation leads to permission assignment. This vulnerability is documented as CVE-2025-64996. The attack needs to be performed locally. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Checkmk up to 2.1.0/2.2.0/2.3.0p40/2.4.0p15 and classified as problematic. Affected by this issue is an unknown functionality of the component mk_inotify Plugin. The manipulation with an unknown input leads to a permission assignment vulnerability. Using CWE to declare the problem leads to CWE-732. The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors. Impacted is confidentiality, integrity, and availability. CVE summarizes:

In Checkmk versions prior to 2.4.0p16, 2.3.0p41, and all versions of 2.2.0 and older, the mk_inotify plugin creates world-readable and writable files, allowing any local user on the system to read the plugin's output and manipulate it, potentially leading to unauthorized access to or modification of monitoring data.

The advisory is shared for download at checkmk.com. This vulnerability is handled as CVE-2025-64996 since 11/12/2025. The exploitation is known to be easy. The attack needs to be approached locally. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 275787 (Linux Distros Unpatched Vulnerability : CVE-2025-64996), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.3.0p41 or 2.4.0p16 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (275787) and CERT Bund (WID-SEC-2025-2617). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Checkmk Checkmk

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 4.9
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 4.4
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Permission assignment
CWE: CWE-732 / CWE-275 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 275787
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-64996

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Checkmk 2.3.0p41/2.4.0p16

Timelineinfo

11/12/2025 CVE reserved
11/18/2025 +6 days Advisory disclosed
11/18/2025 +0 days VulDB entry created
11/24/2025 +6 days VulDB entry last update

Sourcesinfo

Advisory: checkmk.com
Status: Confirmed

CVE: CVE-2025-64996 (🔒)
GCVE (CVE): GCVE-0-2025-64996
GCVE (VulDB): GCVE-100-332816
CERT Bund: WID-SEC-2025-2617 - Checkmk: Mehrere Schwachstellen

Entryinfo

Created: 11/18/2025 20:08
Updated: 11/24/2025 17:17
Changes: 11/18/2025 20:08 (65), 11/19/2025 04:09 (7), 11/20/2025 04:30 (2), 11/24/2025 17:17 (11)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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