CVE-2021-31249
MEDIUM NUCLEICHIYU BF-430, BF-431, and BF-450M Firmware - CRLF Injection via Redirect Parameter
Title source: llmExploitation Summary
CVE-2021-31249 has a Nuclei detection template available — see the Nuclei card below for the Shodan/FOFA recon queries.
Description
A CRLF injection vulnerability was found on BF-430, BF-431, and BF-450M TCP/IP Converter devices from CHIYU Technology Inc due to a lack of validation on the parameter redirect= available on multiple CGI components.
Nuclei Templates (1)
CHIYU TCP/IP Converter - Carriage Return Line Feed Injection
MEDIUMby geeknik
References (3)
Core 3
Core References
Exploit, Third Party Advisory x_refsource_misc
https://seguranca-informatica.pt/dancing-in-the-iot-chiyu-devices-vulnerable-to-remote-attacks/
Vendor Advisory x_refsource_misc
https://www.chiyu-tech.com/msg/message-Firmware-update-87.html
Exploit, Third Party Advisory x_refsource_misc
https://gitbook.seguranca-informatica.pt/cve-and-exploits/cves/chiyu-iot-devices#cve-2021-31249
Scores
CVSS v3
6.5
EPSS
0.1800
EPSS Percentile
96.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Details
CWE
CWE-74
Status
published
Products (3)
chiyu-tech/bf-430_firmware
chiyu-tech/bf-431_firmware
chiyu-tech/bf-450m_firmware
Published
Jun 04, 2021
Tracked Since
Feb 18, 2026