{"id":"CVE-2023-2020","aliases":["EUVD-2023-33548","GHSA-w7j6-p4c4-j78m","UBUNTU-CVE-2023-2020"],"status":"published","title":"Unauthorized scheduling of downtimes via REST API","description":"Insufficient permission checks in the REST API in Tribe29 Checkmk \u003c= 2.1.0p27 and \u003c= 2.2.0b4 (beta) allow unauthorized users to schedule downtimes for any host.","severity":{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-08","score":0.00405,"percentile":0.35051,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-280","CWE-863"],"published":"2023-04-18T11:09:09Z","modified":"2026-10-24T10:30:38Z","affected":[{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"check-mk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.6p5-1","1.2.6p12-1","1.2.6p12-1ubuntu0.16.04.1","1.2.6p12-1ubuntu0.16.04.1+esm1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"check-mk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.8p16-1ubuntu0.1","1.2.8p16-1ubuntu0.2"]}],"products":[{"vendor":"checkmk","product":"checkmk"},{"vendor":"checkmk gmbh","product":"checkmk"},{"vendor":"tribe29","product":"checkmk"}],"references":[{"url":"https://checkmk.com/werk/13981","tags":["x_transferred","Vendor Advisory","advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-2020"},{"url":"https://github.com/advisories/GHSA-w7j6-p4c4-j78m"},{"url":"https://ubuntu.com/security/CVE-2023-2020","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-2020","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2023-2020","title":"Unauthorized scheduling of downtimes via REST API","description":"Insufficient permission checks in the REST API in Tribe29 Checkmk \u003c= 2.1.0p27 and \u003c= 2.2.0b4 (beta) allow unauthorized users to schedule downtimes for any host.","status":"published","published":"2023-04-18T11:09:09.107Z","modified":"2025-02-05T15:48:19.218Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-280"],"updated_at":"2026-11-02T14:35:23.645864Z"}],"euvd":[{"id":"EUVD-2023-33548","description":"Insufficient permission checks in the REST API in Tribe29 Checkmk \u003c= 2.1.0p27 and \u003c= 2.2.0b4 (beta) allow unauthorized users to schedule downtimes for any host.","status":"published","published":"2023-04-18T11:09:09Z","modified":"2025-02-05T15:48:19Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-03T00:04:05.079502Z"}],"ghsa":[{"id":"GHSA-w7j6-p4c4-j78m","title":"Insufficient permission checks in the REST API in Tribe29 Checkmk \u003c= 2.1.0p27 and \u003c= 2.2.0b4 ...","description":"Insufficient permission checks in the REST API in Tribe29 Checkmk \u003c= 2.1.0p27 and \u003c= 2.2.0b4 (beta) allow unauthorized users to schedule downtimes for any host.","status":"published","published":"2023-04-18T12:30:16Z","modified":"2024-04-04T03:32:03Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"cwes":["CWE-280","CWE-863"],"updated_at":"2026-11-02T14:56:15.929186Z"}],"nvd":[{"id":"CVE-2023-2020","description":"Insufficient permission checks in the REST API in Tribe29 Checkmk \u003c= 2.1.0p27 and \u003c= 2.2.0b4 (beta) allow unauthorized users to schedule downtimes for any host.","status":"published","published":"2023-04-18T12:15:07.537Z","modified":"2026-06-17T05:51:12.637Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-280","CWE-863"],"updated_at":"2026-11-02T14:07:56.683259Z"}],"osv":[{"id":"CVE-2023-2020","description":"Insufficient permission checks in the REST API in Tribe29 Checkmk \u003c= 2.1.0p27 and \u003c= 2.2.0b4 (beta) allow unauthorized users to schedule downtimes for any host.","status":"published","published":"2023-04-18T12:15:07.537Z","modified":"2026-10-24T10:30:38.696741315Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:30.334753Z"},{"id":"UBUNTU-CVE-2023-2020","description":"Insufficient permission checks in the REST API in Tribe29 Checkmk \u003c= 2.1.0p27 and \u003c= 2.2.0b4 (beta) allow unauthorized users to schedule downtimes for any host.","status":"published","published":"2023-04-18T12:15:00Z","modified":"2025-10-24T05:01:14Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium"},{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T16:54:18.756095Z"}]}}