CVE:CVE-2021-31252
CNNVD:CNNVD-202106-372
Chiyu CHIYU BF-430等都是中国台湾七友科技（Chiyu）公司的一款为门禁、考勤系统等设备提供通讯的联网服务器。 
CHIYU Technology 的 BF-630、BF-450M、BF-430、BF-431、BF631-W、BF830-W、Webpass 和 SEMAC 设备中存在安全漏洞，该漏洞源于受影响产品中的开放重定向，CHIYU技术可以通过发送一个具有特殊URL的链接来说服用户点击它。
solution:Upgrade chiyu-tech bf-430_firmware to a higher version than -; Upgrade chiyu-tech bf-431_firmware to a higher version than -; Upgrade chiyu-tech bf-450m_firmware to a higher version than -; Upgrade chiyu-tech semac_s2_firmware to a higher version than -; Upgrade chiyu-tech semac_d1_firmware to a higher version than -; Upgrade chiyu-tech semac_d2_firmware to a higher version than -; Upgrade chiyu-tech semac_d4_firmware to a higher version than -; Upgrade chiyu-tech semac_s3v3_firmware to a higher version than -; Upgrade chiyu-tech semac_d2_n300_firmware to a higher version than -; Upgrade chiyu-tech semac_s1_osdp_firmware to a higher version than -; Upgrade chiyu-tech bf-630_firmware to a higher version than -; Upgrade chiyu-tech bf-631w_firmware to a higher version than -; Upgrade chiyu-tech bf-830w_firmware to a higher version than -; Upgrade chiyu-tech webpass_firmware to a higher version than -