{"id":"CVE-2023-31211","aliases":["EUVD-2023-35526","GHSA-j8hh-2v2c-wqmv","UBUNTU-CVE-2023-31211"],"status":"published","title":"Disabled automation users could still authenticate","description":"Insufficient authentication flow in Checkmk before 2.2.0p18, 2.1.0p38 and 2.0.0p39 allows attacker to use locked credentials","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00511,"percentile":0.44113,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-303","CWE-670","CWE-691"],"published":"2024-01-12T07:49:45Z","modified":"2026-10-28T02:31:04Z","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/16227","tags":["x_transferred","Patch","Vendor Advisory","web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-31211","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-j8hh-2v2c-wqmv"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/31xxx/CVE-2023-31211.json","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2023-31211","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-31211","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2023-31211","title":"Disabled automation users could still authenticate","description":"Insufficient authentication flow in Checkmk before 2.2.0p18, 2.1.0p38 and 2.0.0p39 allows attacker to use locked credentials","status":"published","published":"2024-01-12T07:49:45.294Z","modified":"2025-06-17T21:09:17.486Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-303"],"updated_at":"2026-11-02T14:35:27.430605Z"}],"euvd":[{"id":"EUVD-2023-35526","description":"Insufficient authentication flow in Checkmk before 2.2.0p18, 2.1.0p38 and 2.0.0p39 allows attacker to use locked credentials","status":"published","published":"2024-01-12T07:49:45Z","modified":"2025-06-17T21:09:17Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T20:32:21.531807Z"}],"ghsa":[{"id":"GHSA-j8hh-2v2c-wqmv","title":"Insufficient authentication flow in Checkmk before 2.2.0p17, 2.1.0p37 and 2.0.0p39 allows...","description":"Insufficient authentication flow in Checkmk before 2.2.0p17, 2.1.0p37 and 2.0.0p39 allows attacker to use locked credentials","status":"published","published":"2024-01-12T09:30:29Z","modified":"2024-08-26T12:32:24Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-303","CWE-670","CWE-691"],"updated_at":"2026-11-02T14:58:04.94606Z"}],"nvd":[{"id":"CVE-2023-31211","description":"Insufficient authentication flow in Checkmk before 2.2.0p18, 2.1.0p38 and 2.0.0p39 allows attacker to use locked credentials","status":"published","published":"2024-01-12T08:15:43.137Z","modified":"2026-06-17T05:56:33.837Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-303","CWE-670"],"updated_at":"2026-11-02T14:09:00.788714Z"}],"osv":[{"id":"CVE-2023-31211","title":"Disabled automation users could still authenticate","description":"Insufficient authentication flow in Checkmk before 2.2.0p18, 2.1.0p38 and 2.0.0p39 allows attacker to use locked credentials","status":"published","published":"2024-01-12T07:49:45.294Z","modified":"2026-10-28T02:31:04.592268763Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-303"],"updated_at":"2026-11-02T15:44:31.790231Z"},{"id":"UBUNTU-CVE-2023-31211","description":"Insufficient authentication flow in Checkmk before 2.2.0p18, 2.1.0p38 and 2.0.0p39 allows attacker to use locked credentials","status":"published","published":"2024-01-12T08:15:00Z","modified":"2025-10-24T05:01:57Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium"}],"updated_at":"2026-11-02T16:54:20.997471Z"}]}}