{"id":"CVE-2021-31641","aliases":["EUVD-2021-18529","GHSA-j8pq-98x9-wx56"],"status":"published","title":"An unauthenticated XSS vulnerability exists in several IoT devices from CHIYU Technology,...","description":"An unauthenticated XSS vulnerability exists in several IoT devices from CHIYU Technology, including BF-630, BF-450M, BF-430, BF-431, BF631-W, BF830-W, Webpass, BF-MINI-W, and SEMAC due to a lack of sanitization when the HTTP 404 message is generated.","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":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.05125,"percentile":0.92506,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2021-06-01T14:11:39Z","modified":"2026-06-17T03:52:06Z","products":[{"vendor":"chiyu-tech","product":"bf-430_firmware"},{"vendor":"chiyu-tech","product":"bf-431_firmware"},{"vendor":"chiyu-tech","product":"bf-450m_firmware"},{"vendor":"chiyu-tech","product":"bf-630_firmware"},{"vendor":"chiyu-tech","product":"bf-631w_firmware"},{"vendor":"chiyu-tech","product":"bf-830w_firmware"},{"vendor":"chiyu-tech","product":"bfminiw_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://gitbook.seguranca-informatica.pt/cve-and-exploits/cves/chiyu-iot-devices#cve-2021-31641","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://seguranca-informatica.pt/dancing-in-the-iot-chiyu-devices-vulnerable-to-remote-attacks/#.YLY_lXmSlPY","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":"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-2021-31641"},{"url":"https://github.com/advisories/GHSA-j8pq-98x9-wx56"}],"sources":{"cve":[{"id":"CVE-2021-31641","description":"An unauthenticated XSS vulnerability exists in several IoT devices from CHIYU Technology, including BF-630, BF-450M, BF-430, BF-431, BF631-W, BF830-W, Webpass, BF-MINI-W, and SEMAC due to a lack of sanitization when the HTTP 404 message is generated.","status":"published","published":"2021-06-01T14:11:39Z","modified":"2024-08-03T23:03:33.666Z","updated_at":"2026-11-02T14:33:05.665371Z"}],"euvd":[{"id":"EUVD-2021-18529","description":"An unauthenticated XSS vulnerability exists in several IoT devices from CHIYU Technology, including BF-630, BF-450M, BF-430, BF-431, BF631-W, BF830-W, Webpass, BF-MINI-W, and SEMAC due to a lack of sanitization when the HTTP 404 message is generated.","status":"published","published":"2021-06-01T14:11:39Z","modified":"2024-08-03T23:03:33Z","updated_at":"2026-11-03T03:24:38.423371Z"}],"ghsa":[{"id":"GHSA-j8pq-98x9-wx56","title":"An unauthenticated XSS vulnerability exists in several IoT devices from CHIYU Technology,...","description":"An unauthenticated XSS vulnerability exists in several IoT devices from CHIYU Technology, including BF-630, BF-450M, BF-430, BF-431, BF631-W, BF830-W, Webpass, BF-MINI-W, and SEMAC due to a lack of sanitization when the HTTP 404 message is generated.","status":"published","published":"2022-05-24T19:03:42Z","modified":"2023-01-29T05:06:22Z","cwes":["CWE-79"],"updated_at":"2026-11-02T14:46:00.528527Z"}],"nvd":[{"id":"CVE-2021-31641","description":"An unauthenticated XSS vulnerability exists in several IoT devices from CHIYU Technology, including BF-630, BF-450M, BF-430, BF-431, BF631-W, BF830-W, Webpass, BF-MINI-W, and SEMAC due to a lack of sanitization when the HTTP 404 message is generated.","status":"published","published":"2021-06-01T15:15:07.68Z","modified":"2026-06-17T03:52:06.447Z","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":"primary"},{"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":"2026-11-02T14:06:53.987491Z"}]}}