{"id":"CVE-2021-31643","aliases":["EUVD-2021-18531","GHSA-hxrr-8f87-qrgp"],"status":"published","title":"An XSS vulnerability exists in several IoT devices from CHIYU Technology, including SEMAC,...","description":"An XSS vulnerability exists in several IoT devices from CHIYU Technology, including SEMAC, Biosense, BF-630, BF-631, and Webpass due to a lack of sanitization on the component if.cgi - username parameter.","severity":{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.8845,"percentile":0.99774,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2021-06-01T14:16:12Z","modified":"2026-06-17T03:52:06Z","products":[{"vendor":"chiyu-tech","product":"bf-630_firmware"},{"vendor":"chiyu-tech","product":"bf-631_firmware"},{"vendor":"chiyu-tech","product":"biosense_firmware"},{"vendor":"chiyu-tech","product":"semac_d1_firmware"},{"vendor":"chiyu-tech","product":"semac_d2_firmware"},{"vendor":"chiyu-tech","product":"semac_d2_n300_firmware"},{"vendor":"chiyu-tech","product":"semac_d4_firmware"},{"vendor":"chiyu-tech","product":"semac_s1_osdp_firmware"},{"vendor":"chiyu-tech","product":"semac_s2_firmware"},{"vendor":"chiyu-tech","product":"semac_s3v3_firmware"},{"vendor":"chiyu-tech","product":"webpass_firmware"}],"references":[{"url":"https://seguranca-informatica.pt/dancing-in-the-iot-chiyu-devices-vulnerable-to-remote-attacks/","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://www.chiyu-tech.com/msg/message-Firmware-update-87.html","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://gitbook.seguranca-informatica.pt/cve-and-exploits/cves/chiyu-iot-devices#cve-2021-31643","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"http://packetstormsecurity.com/files/162887/CHIYU-IoT-Cross-Site-Scripting.html","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","VDB Entry"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-31643"},{"url":"https://github.com/advisories/GHSA-hxrr-8f87-qrgp"}],"sources":{"cve":[{"id":"CVE-2021-31643","description":"An XSS vulnerability exists in several IoT devices from CHIYU Technology, including SEMAC, Biosense, BF-630, BF-631, and Webpass due to a lack of sanitization on the component if.cgi - username parameter.","status":"published","published":"2021-06-01T14:16:12Z","modified":"2024-08-03T23:03:33.649Z","updated_at":"2026-11-02T14:33:05.665371Z"}],"euvd":[{"id":"EUVD-2021-18531","description":"An XSS vulnerability exists in several IoT devices from CHIYU Technology, including SEMAC, Biosense, BF-630, BF-631, and Webpass due to a lack of sanitization on the component if.cgi - username parameter.","status":"published","published":"2021-06-01T14:16:12Z","modified":"2024-08-03T23:03:33Z","updated_at":"2026-11-03T03:24:38.423371Z"}],"ghsa":[{"id":"GHSA-hxrr-8f87-qrgp","title":"An XSS vulnerability exists in several IoT devices from CHIYU Technology, including SEMAC,...","description":"An XSS vulnerability exists in several IoT devices from CHIYU Technology, including SEMAC, Biosense, BF-630, BF-631, and Webpass due to a lack of sanitization on the component if.cgi - username parameter.","status":"published","published":"2022-05-24T19:03:41Z","modified":"2023-01-29T05:06:22Z","cwes":["CWE-79"],"updated_at":"2026-11-02T14:46:00.528527Z"}],"nvd":[{"id":"CVE-2021-31643","description":"An XSS vulnerability exists in several IoT devices from CHIYU Technology, including SEMAC, Biosense, BF-630, BF-631, and Webpass due to a lack of sanitization on the component if.cgi - username parameter.","status":"published","published":"2021-06-01T15:15:07.747Z","modified":"2026-06-17T03:52:06.72Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":3.5,"vector":"AV:N/AC:M/Au:S/C:N/I:P/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:06:53.987491Z"}]}}