{"id":"CVE-2021-27213","aliases":["EUVD-2021-13978","GHSA-63mg-762w-r25h"],"status":"published","title":"config.py in pystemon before 2021-02-13 allows code execution via YAML deserialization because...","description":"config.py in pystemon before 2021-02-13 allows code execution via YAML deserialization because SafeLoader and safe_load are not used.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.02728,"percentile":0.86278,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-502"],"published":"2021-02-14T03:05:22Z","modified":"2026-10-20T10:54:35Z","products":[{"vendor":"pystemon_project","product":"pystemon"}],"references":[{"url":"https://github.com/cvandeplas/pystemon/commit/dbeb87afefdb63de2f4cff69b6f10c5965d14b54","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"https://www.huntr.dev/bounties/1-other-pystemon/","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-27213"},{"url":"https://github.com/advisories/GHSA-63mg-762w-r25h"}],"sources":{"cve":[{"id":"CVE-2021-27213","description":"config.py in pystemon before 2021-02-13 allows code execution via YAML deserialization because SafeLoader and safe_load are not used.","status":"published","published":"2021-02-14T03:05:22Z","modified":"2024-08-03T20:40:47.392Z","updated_at":"2026-11-02T14:33:04.679189Z"}],"euvd":[{"id":"EUVD-2021-13978","description":"config.py in pystemon before 2021-02-13 allows code execution via YAML deserialization because SafeLoader and safe_load are not used.","status":"published","published":"2021-02-14T03:05:22Z","modified":"2024-08-03T20:40:47Z","updated_at":"2026-11-03T03:24:49.808499Z"}],"ghsa":[{"id":"GHSA-63mg-762w-r25h","title":"config.py in pystemon before 2021-02-13 allows code execution via YAML deserialization because...","description":"config.py in pystemon before 2021-02-13 allows code execution via YAML deserialization because SafeLoader and safe_load are not used.","status":"published","published":"2022-05-24T17:42:08Z","modified":"2023-01-29T05:05:42Z","cwes":["CWE-502"],"updated_at":"2026-11-02T14:45:51.307262Z"}],"nvd":[{"id":"CVE-2021-27213","description":"config.py in pystemon before 2021-02-13 allows code execution via YAML deserialization because SafeLoader and safe_load are not used.","status":"published","published":"2021-02-14T04:15:12.837Z","modified":"2026-06-17T03:44:28.633Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T14:06:50.031227Z"}],"osv":[{"id":"CVE-2021-27213","description":"config.py in pystemon before 2021-02-13 allows code execution via YAML deserialization because SafeLoader and safe_load are not used.","status":"published","published":"2021-02-14T04:15:12.837Z","modified":"2026-10-20T10:54:35.295991214Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:18.778776Z"}]}}