{"id":"CVE-2021-44163","aliases":["EUVD-2021-31013","GHSA-wxf3-qxfw-xchv"],"status":"published","title":"Chain Sea Information Integration Co., Ltd ai chatbot system - Reflected XSS","description":"Chain Sea ai chatbot backend has improper filtering of special characters in URL parameters, which allows a remote attacker to perform JavaScript injection for XSS (reflected Cross-site scripting) attack without authentication.","severity":{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00774,"percentile":0.56247,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2021-12-20T03:10:22Z","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-132-5399-03b81-1.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-44163"},{"url":"https://github.com/advisories/GHSA-wxf3-qxfw-xchv"}],"sources":{"cve":[{"id":"CVE-2021-44163","title":"Chain Sea Information Integration Co., Ltd ai chatbot system - Reflected XSS","description":"Chain Sea ai chatbot backend has improper filtering of special characters in URL parameters, which allows a remote attacker to perform JavaScript injection for XSS (reflected Cross-site scripting) attack without authentication.","status":"published","published":"2021-12-20T03:10:22.998Z","modified":"2024-09-16T16:43:57.373Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:33:01.166399Z"}],"euvd":[{"id":"EUVD-2021-31013","description":"Chain Sea ai chatbot backend has improper filtering of special characters in URL parameters, which allows a remote attacker to perform JavaScript injection for XSS (reflected Cross-site scripting) attack without authentication.","status":"published","published":"2021-12-20T03:10:22Z","modified":"2024-09-16T16:43:57Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-03T00:55:48.659023Z"}],"ghsa":[{"id":"GHSA-wxf3-qxfw-xchv","title":"Chain Sea ai chatbot backend has improper filtering of special characters in URL parameters,...","description":"Chain Sea ai chatbot backend has improper filtering of special characters in URL parameters, which allows a remote attacker to perform JavaScript injection for XSS (reflected Cross-site scripting) attack without authentication.","status":"published","published":"2021-12-21T00:00:51Z","modified":"2023-02-03T05:02:52Z","cwes":["CWE-79"],"updated_at":"2026-11-02T14:53:15.265364Z"}],"nvd":[{"id":"CVE-2021-44163","description":"Chain Sea ai chatbot backend has improper filtering of special characters in URL parameters, which allows a remote attacker to perform JavaScript injection for XSS (reflected Cross-site scripting) attack without authentication.","status":"published","published":"2021-12-20T03:15:06.77Z","modified":"2026-06-17T04:11:58.78Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:07:02.566991Z"}]}}