CVE-2021-31250

CHIYU IoT Cross Site Scripting

Severity Score

5.4

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Multiple storage XSS vulnerabilities were discovered on BF-430, BF-431 and BF-450M TCP/IP Converter devices from CHIYU Technology Inc due to a lack of sanitization of the input on the components man.cgi, if.cgi, dhcpc.cgi, ppp.cgi.

Se detectaron múltiples vulnerabilidades de tipo XSS de almacenamiento en los dispositivos convertidores TCP/IP BF-430, BF-431 y BF-450M de CHIYU Technology Inc, debido a una falta de saneamiento de la entrada en los componentes man.cgi, if.cgi, dhcpc.cgi, ppp.cgi

CHIYU IoT devices suffer from multiple cross site scripting vulnerabilities. Versions affected include BF-430, BF-431, BF-450M, BF-630, BF631-W, BF830-W, Webpass, BF-MINI-W, and SEMAC.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

Single

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-04-15 CVE Reserved
2021-06-01 CVE Published
2021-06-01 First Exploit
2024-08-03 CVE Updated
2025-02-19 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CAPEC

References (4)

URL	Tag	Source

URL	Date	SRC
https://packetstorm.news/files/id/162887	2021-06-01
https://gitbook.seguranca-informatica.pt/cve-and-exploits/cves/chiyu-iot-devices#cve-2021-31250	2024-08-03
https://seguranca-informatica.pt/dancing-in-the-iot-chiyu-devices-vulnerable-to-remote-attacks	2024-08-03

URL	Date	SRC

URL	Date	SRC
https://www.chiyu-tech.com/msg/message-Firmware-update-87.htm	2021-06-08

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Chiyu-tech Search vendor "Chiyu-tech"	Bf-430 Firmware Search vendor "Chiyu-tech" for product "Bf-430 Firmware"	-	-	Affected	in	Chiyu-tech Search vendor "Chiyu-tech"	Bf-430 Search vendor "Chiyu-tech" for product "Bf-430"	-	-	Safe
Chiyu-tech Search vendor "Chiyu-tech"	Bf-431 Firmware Search vendor "Chiyu-tech" for product "Bf-431 Firmware"	-	-	Affected	in	Chiyu-tech Search vendor "Chiyu-tech"	Bf-431 Search vendor "Chiyu-tech" for product "Bf-431"	-	-	Safe
Chiyu-tech Search vendor "Chiyu-tech"	Bf-450m Firmware Search vendor "Chiyu-tech" for product "Bf-450m Firmware"	-	-	Affected	in	Chiyu-tech Search vendor "Chiyu-tech"	Bf-450m Search vendor "Chiyu-tech" for product "Bf-450m"	-	-	Safe