Checkmk
CVE-2025-64996
MEDIUM
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V13 - Configuration Permission assignment review
|
| Impact | CVSS score of 4.8 (MEDIUM). Attack characteristics: local attack vector, low complexity, low privileges required, no user interaction not required. EPSS exploitation probability: 0.02%. |
| Exploit ScenarioDerived | A local attacker with access to the system could access resources due to misconfigured permissions. |
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Alert meAnalysisAIv1 – Mar 28, 2026
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. Rated medium severity (CVSS 4.8), this vulnerability is low attack complexity. No vendor patch available.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Review and restrict file/resource permissions, apply principle of least privilege.
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Technical ContextAI · show details
This vulnerability is classified as Incorrect Permission Assignment (CWE-732), which allows attackers to access resources due to misconfigured permissions. 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. Affected products include: Checkmk. Version information: prior to 2.4.0.
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Severity by source
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
Primary rating from Vendor (checkmk) · only source for this CVE.
CVSS VectorVendor: checkmk
DescriptionCVE.org
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.
Executive ViewAI
Organizations using Checkmk should be aware of moderate risk from CVE-2025-64996, a incorrect permissions vulnerability rated CVSS 4.8. Attackers could gain access beyond their authorized level. Organizations should apply vendor updates when available and monitor for exploitation.
Apply vendor patch. If patching is delayed: manually tighten permissions on affected resources.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.
Affected Products (CPE)CVE.org
Check_MK before 1.2.8p26 mishandles certain errors within the failed-login save feature because of a race condition, whi
The web management console of CheckMK Raw Edition (versions 1.5.0 to 1.6.0) allows a misconfiguration of the web-app Dok
The web management console of CheckMK Enterprise Edition (versions 1.5.0 to 2.0.0p9) does not properly sanitise the uplo
Local privilege escalation in the Checkmk Windows Agent's Windows License plugin allows an authenticated low-privileged
Stored/transmitted cross-site scripting in Checkmk's distributed monitoring lets an attacker who already controls a remo
Authenticated path traversal in Checkmk's report scheduler lets a user with valid application credentials write report f
Improper restriction of excessive authentication attempts on some authentication methods in Checkmk before 2.3.0b5 (beta
The CheckMK management web console (versions 1.5.0 to 2.0.0) does not sanitise user input in various parameters of the W
Local privilege escalation in Checkmk allows site users with high privileges to escalate to root by manipulating site co
Bypass of two factor authentication in RestAPI in Checkmk < 2.3.0p16 and < 2.2.0p34 allows authenticated users to bypass
Improper neutralization of active check command arguments in Checkmk < 2.1.0p32, < 2.0.0p38, < 2.2.0p4 leads to arbitrar
Improper neutralization of livestatus command delimiters in the RestAPI in Checkmk < 2.0.0p36, < 2.1.0p28, and < 2.2.0b8
GitHub PoC
Exploit-DB