CVE-2020-8839
MEDIUMCVSS 6.1/10EPSS 2.07%
Last modified
CVE-2020-8839 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. Stored XSS was discovered on CHIYU BF-430 232/485 TCP/IP Converter devices before 1.16.00, as demonstrated by the /if.cgi TF_submask field.. EPSS estimates a 2.07% chance of exploitation in the next 30 days.
Description
Stored XSS was discovered on CHIYU BF-430 232/485 TCP/IP Converter devices before 1.16.00, as demonstrated by the /if.cgi TF_submask field.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Chiyu-T | Bf-430 Firmware | < 1.16.00 |
References
- http://packetstormsecurity.com/files/156289/CHIYU-BF430-TCP-IP-Converter-Cross-Site-Scripting.htmlExploit, Third Party Advisory, VDB Entry
- https://drive.google.com/open?id=1eDN0rsGPs4-yxeMxl7MGh__yjdbl-wONExploit, Third Party Advisory
- http://packetstormsecurity.com/files/156289/CHIYU-BF430-TCP-IP-Converter-Cross-Site-Scripting.htmlExploit, Third Party Advisory, VDB Entry
- https://drive.google.com/open?id=1eDN0rsGPs4-yxeMxl7MGh__yjdbl-wONExploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-8839?
Stored XSS was discovered on CHIYU BF-430 232/485 TCP/IP Converter devices before 1.16.00, as demonstrated by the /if.cgi TF_submask field.
How severe is CVE-2020-8839?
CVE-2020-8839 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 2.07% probability of exploitation in the next 30 days.
How do I fix CVE-2020-8839?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2020-8839?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST