{"id":"CVE-2021-44159","aliases":["EUVD-2021-31009","GHSA-2pg3-5vwj-wh4m"],"status":"published","title":"4MOSAn GCB Doctor - Unrestricted Upload of File","description":"4MOSAn GCB Doctor’s file upload function has improper user privilege control. A remote attacker can upload arbitrary files including webshell files without authentication and execute arbitrary code in order to perform arbitrary system operations or deny of service attack.","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":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.03521,"percentile":0.89378,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-434"],"published":"2021-12-20T03:10:19Z","modified":"2026-06-17T04:11:58Z","products":[{"vendor":"4mosan","product":"gcb doctor"},{"vendor":"4mosan","product":"gcb_doctor"}],"references":[{"url":"https://www.twcert.org.tw/tw/cp-132-5395-eee40-1.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-44159"},{"url":"https://github.com/advisories/GHSA-2pg3-5vwj-wh4m"}],"sources":{"cve":[{"id":"CVE-2021-44159","title":"4MOSAn GCB Doctor - Unrestricted Upload of File","description":"4MOSAn GCB Doctor’s file upload function has improper user privilege control. A remote attacker can upload arbitrary files including webshell files without authentication and execute arbitrary code in order to perform arbitrary system operations or deny of service attack.","status":"published","published":"2021-12-20T03:10:19.975Z","modified":"2024-09-17T00:11:07.348Z","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":"cna"}],"cwes":["CWE-434"],"updated_at":"2026-11-02T14:33:01.166399Z"}],"euvd":[{"id":"EUVD-2021-31009","description":"4MOSAn GCB Doctor’s file upload function has improper user privilege control. A remote attacker can upload arbitrary files including webshell files without authentication and execute arbitrary code in order to perform arbitrary system operations or deny of service attack.","status":"published","published":"2021-12-20T03:10:19Z","modified":"2024-09-17T00:11:07Z","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":"2026-11-03T00:29:01.573177Z"}],"ghsa":[{"id":"GHSA-2pg3-5vwj-wh4m","title":"4MOSAn GCB Doctor’s file upload function has improper user privilege control. A remote attacker...","description":"4MOSAn GCB Doctor’s file upload function has improper user privilege control. A remote attacker can upload arbitrary files including webshell files without authentication and execute arbitrary code in order to perform arbitrary system operations or deny of service attack.","status":"published","published":"2021-12-21T00:00:51Z","modified":"2023-02-03T05:02:38Z","cwes":["CWE-434"],"updated_at":"2026-11-02T14:53:12.235581Z"}],"nvd":[{"id":"CVE-2021-44159","description":"4MOSAn GCB Doctor’s file upload function has improper user privilege control. A remote attacker can upload arbitrary files including webshell files without authentication and execute arbitrary code in order to perform arbitrary system operations or deny of service attack.","status":"published","published":"2021-12-20T03:15:06.65Z","modified":"2026-06-17T04:11:58.373Z","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":"secondary"},{"version":"2.0","score":10,"vector":"AV:N/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-434"],"updated_at":"2026-11-02T14:07:02.566991Z"}]}}