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CVE-2025-64996— Overly broad file permissions in the mk_inotify plugin allows reading and manipulating the plugin's output

Quick assessment

Affected
Checkmk GmbH Checkmk
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Checkmk是Checkmk公司的一个 IT 监控平台。 Checkmk 2.4.0p16之前版本、2.3.0p41之前版本和2.2.0及之前所有版本存在安全漏洞，该漏洞源于mk_inotify插件创建全局可读写文件，可能导致未经授权的访问或修改监控数据。

AI Predicted 4.3 Difficulty: Easy EPSS 0.11% · P1
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I. Basic Information for CVE-2025-64996

Vulnerability Information
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Vulnerability Title
Overly broad file permissions in the mk_inotify plugin allows reading and manipulating the plugin's output
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:L/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
关键资源的不正确权限授予
Source: CVE Program / CVE List V5
Vulnerability Title
Checkmk 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Checkmk是Checkmk公司的一个 IT 监控平台。 Checkmk 2.4.0p16之前版本、2.3.0p41之前版本和2.2.0及之前所有版本存在安全漏洞，该漏洞源于mk_inotify插件创建全局可读写文件，可能导致未经授权的访问或修改监控数据。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Checkmk GmbH Checkmk 2.4.0 ~ 2.4.0p16 -

II. Public POCs for CVE-2025-64996

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III. Intelligence Information for CVE-2025-64996

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Patches & Fixes for CVE-2025-64996 (1)

Same Patch Batch · Checkmk GmbH · 2025-11-18 · 3 CVEs total

CVE-2025-58121 Insufficient permission validation on multiple REST API endpoints
CVE-2025-58122 Insufficient permission validation when configuring notification parameters

IV. Related Vulnerabilities

Same product: Checkmk
Same vendor: Checkmk GmbH
Same weakness: CWE-732