{"id":"CVE-2025-65000","title":"SSH private keys of the \"Remote alert handlers (Linux)\" rule were exposed in the rule page's HTML source in Checkmk <= 2.4.0p18 and all versions of Checkmk 2.3.0","summary":"SSH private keys of the \"Remote alert handlers (Linux)\" rule were exposed in the rule page's HTML source in Checkmk <= 2.4.0p18 and all versions of Checkmk 2.3.0. This potentially allowed unauthorized triggering of predefined alert handl…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","cwe":["CWE-212"],"vendor":"checkmk","product":"checkmk","affected":["checkmk = 2.2.0","checkmk = 2.3.0","checkmk = 2.4.0"],"published":"2025-12-18","updated":"2026-10-13","sourceUpdated":"2026-10-13T11:10:00.203","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-65000","references":[{"url":"https://checkmk.com/werk/19030","label":"security@checkmk.com"}],"tags":["nvd"],"epss":0.00216,"epssPercentile":0.11139,"ingestedAt":"2026-10-13T11:23:51.132Z","slug":"CVE-2025-65000","body":"## Overview\n\nSSH private keys of the \"Remote alert handlers (Linux)\" rule were exposed in the rule page's HTML source in Checkmk <= 2.4.0p18 and all versions of Checkmk 2.3.0. This potentially allowed unauthorized triggering of predefined alert handlers on hosts where the handler was deployed.\n\n## Affected\n\n- `checkmk = 2.2.0`\n- `checkmk = 2.3.0`\n- `checkmk = 2.4.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}