XSS in Chiyu-Tech Bf-430
CVE-2021-31641
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.051 (92.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 92.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.051 · newest: 0.051 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- gitbook.seguranca-informatica.pt/cve-and-exploits/cves/chiyu-iot-devices (Exploit, Third Party Advisory)
- seguranca-informatica.pt/dancing-in-the-iot-chiyu-devices-vulnerable-to-remote-… (Exploit, Third Party Advisory)
- www.chiyu-tech.com/msg/message-Firmware-update-87.html (Vendor Advisory)
- packetstormsecurity.com/files/162887/CHIYU-IoT-Cross-Site-Scripting.html (Exploit, VDB Entry, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-31641?
- CVE-2021-31641 is a medium-severity vulnerability in Chiyu-Tech Bf-430, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-06-01.
- How severe is CVE-2021-31641?
- Medium severity. CVSS v3 base score is 6.1 out of 10.
- Is CVE-2021-31641 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.