What’s Vulnerable › Vulnerabilities
CVE-2021-31641
- Severity: medium (CVSS 6.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 5.1% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2021-06-01 · updated 2026-06-17
- Weakness: CWE-79
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.
Affected products
- Chiyu-Tech Bf-430 Firmware: all versions
- Chiyu-Tech Bf-431 Firmware: all versions
- Chiyu-Tech Bf-450M Firmware: all versions
- Chiyu-Tech Bf-630 Firmware: all versions
- Chiyu-Tech Bf-631W Firmware: all versions
- Chiyu-Tech Bf-830W Firmware: all versions
- Chiyu-Tech Bfminiw Firmware: all versions
- Chiyu-Tech Semac D1 Firmware: all versions
- Chiyu-Tech Semac D2 Firmware: all versions
- Chiyu-Tech Semac D2 N300 Firmware: all versions
- Chiyu-Tech Semac D4 Firmware: all versions
- Chiyu-Tech Semac S1 Osdp Firmware: all versions
- Chiyu-Tech Semac S2 Firmware: all versions
- Chiyu-Tech Semac S3V3 Firmware: all versions
- Chiyu-Tech Webpass Firmware: all versions
References
- http://packetstormsecurity.com/files/162887/CHIYU-IoT-Cross-Site-Scripting.html
- https://gitbook.seguranca-informatica.pt/cve-and-exploits/cves/chiyu-iot-devices#cve-2021-31641
- https://seguranca-informatica.pt/dancing-in-the-iot-chiyu-devices-vulnerable-to-remote-attacks/#.YLY_lXmSlPY
- https://www.chiyu-tech.com/msg/message-Firmware-update-87.html
- http://packetstormsecurity.com/files/162887/CHIYU-IoT-Cross-Site-Scripting.html
- https://gitbook.seguranca-informatica.pt/cve-and-exploits/cves/chiyu-iot-devices#cve-2021-31641
- https://seguranca-informatica.pt/dancing-in-the-iot-chiyu-devices-vulnerable-to-remote-attacks/#.YLY_lXmSlPY
- https://www.chiyu-tech.com/msg/message-Firmware-update-87.html
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