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checkmk

Insufficient permission validation in Checkmk versions prior to 2.4.0p17 and 2.3.0p42 allow low-privileged users to view agent information via the REST API, which could lead to information disclosure.

CVE-2025-64997 is a vulnerability classified under CWE-280 (Improper Handling of Insufficient Permissions or Privileges) affecting Checkmk, a widely used IT infrastructure monitoring solution developed by Checkmk GmbH. The flaw exists in versions prior to 2.4.0p17 and 2.3.0p42, where the REST API does not adequately enforce permission checks for low-privileged users attempting to access agent information. Agents in Checkmk collect detailed system and network data from monitored hosts, which can include sensitive configuration details, system status, and potentially security-relevant information. Due to insufficient permission validation, a user with limited privileges can query the REST API and retrieve agent data that should be restricted, leading to unauthorized information disclosure. The vulnerability has a CVSS v4.0 base score of 6.3, indicating a medium severity level. The attack vector is network-based (AV:N), requires low attack complexity (AC:L), no authentication beyond low privileges (PR:L), and no user interaction (UI:N). The impact is limited to confidentiality (VC:L), with no integrity or availability impact. No known exploits have been reported in the wild as of the publication date (December 18, 2025). The vulnerability primarily facilitates reconnaissance by exposing internal monitoring data that could assist attackers in planning further attacks or lateral movement within a network. The vendor has released patched versions 2.4.0p17 and 2.3.0p42 to address this issue, although no direct patch links were provided in the source data. Organizations using affected Checkmk versions should upgrade promptly and review their API access policies.

Detailed information about CVE-2025-64997: CWE-280: Improper Handling of Insufficient Permissions or Privileges in Checkmk GmbH Checkmk affecting Checkmk GmbH C

CVE-2025-64997: CWE-280: Improper Handling of Insufficient Permissions or Privileges in Checkmk GmbH Checkmk - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2025-64997: CWE-280: Improper Handling of Insufficient Permissions or Privileges in Checkmk GmbH Checkmk

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