CVE-2021-31643
MediumAn XSS vulnerability exists in several IoT devices from CHIYU Technology, including SEMAC, Biosense, BF-630, BF-631, and Webpass due to a lack of sanitization on the component if.cgi - username parameter.
Published Jun 1, 2021 · Updated Nov 21, 2024
Key Facts
Patch immediately- CVE-2021-31643 is a medium-severity vulnerability (CVSS 5.4 v3.1) affecting Bf-630 Firmware (Chiyu-Tech), Bf-631 Firmware (Chiyu-Tech), Biosense Firmware (Chiyu-Tech) and 8 more products.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 88% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
5.4
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
EPSS (30-day exploit likelihood)
88%
Higher than 99.7% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
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Description
An XSS vulnerability exists in several IoT devices from CHIYU Technology, including SEMAC, Biosense, BF-630, BF-631, and Webpass due to a lack of sanitization on the component if.cgi - username parameter.
Affected Products
11 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Bf-630 FirmwareChiyu-Tech | See advisory | n/a |
| Bf-631 FirmwareChiyu-Tech | See advisory | n/a |
| Biosense FirmwareChiyu-Tech | See advisory | n/a |
| Semac D1 FirmwareChiyu-Tech | See advisory | n/a |
| Semac D2 FirmwareChiyu-Tech | See advisory | n/a |
Timeline
Publicly disclosed
Jun 1, 2021
Last updated
Nov 21, 2024
Weakness Type
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
References
- advisoryhttps://www.chiyu-tech.com/msg/message-Firmware-update-87.html
- exploithttp://packetstormsecurity.com/files/162887/CHIYU-IoT-Cross-Site-Scripting.html
- exploithttps://gitbook.seguranca-informatica.pt/cve-and-exploits/cves/chiyu-iot-devices#cve-2021-31643
- exploithttps://seguranca-informatica.pt/dancing-in-the-iot-chiyu-devices-vulnerable-to-remote-attacks/
FAQ
Common Questions.
An XSS vulnerability exists in several IoT devices from CHIYU Technology, including SEMAC, Biosense, BF-630, BF-631, and Webpass due to a lack of sanitization on the component if.cgi - username parameter.
Affected: Bf-630 Firmware (Chiyu-Tech); Bf-631 Firmware (Chiyu-Tech); Biosense Firmware (Chiyu-Tech), among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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