{"id":"CVE-2021-44164","aliases":["EUVD-2021-31014","GHSA-pv5h-978v-cqvr"],"status":"published","title":"Chain Sea Information Integration Co., Ltd ai chatbot system - Arbitrary File Upload","description":"Chain Sea ai chatbot system’s file upload function has insufficient filtering for special characters in URLs, which allows a remote attacker to by-pass file type validation, upload malicious script and execute arbitrary code without authentication, in order to take control of the system or terminate service.","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":"2026-11-12","score":0.02122,"percentile":0.82156,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-434"],"published":"2021-12-20T03:10:24Z","modified":"2026-06-17T04:11:58Z","products":[{"vendor":"chain sea information integration co., ltd","product":"ai chatbot system"},{"vendor":"chinasea","product":"qb_smart_service_robot"}],"references":[{"url":"https://www.twcert.org.tw/tw/cp-132-5400-c31d1-1.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-44164"},{"url":"https://github.com/advisories/GHSA-pv5h-978v-cqvr"}],"sources":{"cve":[{"id":"CVE-2021-44164","title":"Chain Sea Information Integration Co., Ltd ai chatbot system - Arbitrary File Upload","description":"Chain Sea ai chatbot system’s file upload function has insufficient filtering for special characters in URLs, which allows a remote attacker to by-pass file type validation, upload malicious script and execute arbitrary code without authentication, in order to take control of the system or terminate service.","status":"published","published":"2021-12-20T03:10:24.327Z","modified":"2024-09-16T18:59:15.351Z","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-2021-31014","description":"Chain Sea ai chatbot system’s file upload function has insufficient filtering for special characters in URLs, which allows a remote attacker to by-pass file type validation, upload malicious script and execute arbitrary code without authentication, in order to take control of the system or terminate service.","status":"published","published":"2021-12-20T03:10:24Z","modified":"2024-09-16T18:59:15Z","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":"2026-11-03T00:55:27.571827Z"}],"ghsa":[{"id":"GHSA-pv5h-978v-cqvr","title":"Chain Sea ai chatbot system’s file upload function has insufficient filtering for special...","description":"Chain Sea ai chatbot system’s file upload function has insufficient filtering for special characters in URLs, which allows a remote attacker to by-pass file type validation, upload malicious script and execute arbitrary code without authentication, in order to take control of the system or terminate service.","status":"published","published":"2021-12-21T00:00:51Z","modified":"2023-02-03T05:02:39Z","cwes":["CWE-434"],"updated_at":"2026-11-02T14:53:12.750573Z"}],"nvd":[{"id":"CVE-2021-44164","description":"Chain Sea ai chatbot system’s file upload function has insufficient filtering for special characters in URLs, which allows a remote attacker to by-pass file type validation, upload malicious script and execute arbitrary code without authentication, in order to take control of the system or terminate service.","status":"published","published":"2021-12-20T03:15:06.827Z","modified":"2026-06-17T04:11:58.883Z","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":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-434"],"updated_at":"2026-11-02T14:07:02.566991Z"}]}}