{"id":"CVE-2021-31252","aliases":["EUVD-2021-18164","GHSA-rgg4-cq58-9g4h"],"status":"published","title":"An open redirect vulnerability exists in BF-630, BF-450M, BF-430, BF-431, BF631-W, BF830-W,...","description":"An open redirect vulnerability exists in BF-630, BF-450M, BF-430, BF-431, BF631-W, BF830-W, Webpass, and SEMAC devices from CHIYU Technology that can be exploited by sending a link that has a specially crafted URL to convince the user to click on it.","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":"2026-11-11","score":0.28551,"percentile":0.98158,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-601"],"published":"2021-06-04T20:21:47Z","modified":"2026-06-17T03:51:30Z","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":"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://gitbook.seguranca-informatica.pt/cve-and-exploits/cves/chiyu-iot-devices#cve-2021-31252","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_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-31252"},{"url":"https://github.com/advisories/GHSA-rgg4-cq58-9g4h"}],"sources":{"cve":[{"id":"CVE-2021-31252","description":"An open redirect vulnerability exists in BF-630, BF-450M, BF-430, BF-431, BF631-W, BF830-W, Webpass, and SEMAC devices from CHIYU Technology that can be exploited by sending a link that has a specially crafted URL to convince the user to click on it.","status":"published","published":"2021-06-04T20:21:47Z","modified":"2024-08-03T22:55:53.302Z","updated_at":"2026-11-02T14:33:05.989686Z"}],"euvd":[{"id":"EUVD-2021-18164","description":"An open redirect vulnerability exists in BF-630, BF-450M, BF-430, BF-431, BF631-W, BF830-W, Webpass, and SEMAC devices from CHIYU Technology that can be exploited by sending a link that has a specially crafted URL to convince the user to click on it.","status":"published","published":"2021-06-04T20:21:47Z","modified":"2024-08-03T22:55:53Z","updated_at":"2026-11-03T03:24:39.559154Z"}],"ghsa":[{"id":"GHSA-rgg4-cq58-9g4h","title":"An open redirect vulnerability exists in BF-630, BF-450M, BF-430, BF-431, BF631-W, BF830-W,...","description":"An open redirect vulnerability exists in BF-630, BF-450M, BF-430, BF-431, BF631-W, BF830-W, Webpass, and SEMAC devices from CHIYU Technology that can be exploited by sending a link that has a specially crafted URL to convince the user to click on it.","status":"published","published":"2022-05-24T19:04:00Z","modified":"2023-01-29T05:07:51Z","cwes":["CWE-601"],"updated_at":"2026-11-02T14:46:11.594724Z"}],"nvd":[{"id":"CVE-2021-31252","description":"An open redirect vulnerability exists in BF-630, BF-450M, BF-430, BF-431, BF631-W, BF830-W, Webpass, and SEMAC devices from CHIYU Technology that can be exploited by sending a link that has a specially crafted URL to convince the user to click on it.","status":"published","published":"2021-06-04T21:15:07.547Z","modified":"2026-06-17T03:51:30.527Z","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":5.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-601"],"updated_at":"2026-11-02T14:06:54.439974Z"}]}}