CVE-2021-3646
MEDIUMCVSS 6.1/10EPSS 0.75%
Last modified
CVE-2021-3646 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. btcpayserver is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'). EPSS estimates a 0.75% chance of exploitation in the next 30 days.
Description
btcpayserver is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
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 |
|---|---|---|
| Btcpayserver | Btcpay Server | < 1.2.3 |
References
- https://github.com/btcpayserver/btcpayserver/commit/fc4e47cec608cc3dba24b19d0145ac69320b975ePatch, Third Party Advisory
- https://huntr.dev/bounties/32e30ecf-31fa-45f6-8552-47250ef0e613Exploit, Third Party Advisory
- https://github.com/btcpayserver/btcpayserver/commit/fc4e47cec608cc3dba24b19d0145ac69320b975ePatch, Third Party Advisory
- https://huntr.dev/bounties/32e30ecf-31fa-45f6-8552-47250ef0e613Exploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-3646?
btcpayserver is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
How severe is CVE-2021-3646?
CVE-2021-3646 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.75% probability of exploitation in the next 30 days.
How do I fix CVE-2021-3646?
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-2021-3646?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST