CVE-2021-3632
HIGHCVSS 7.5/10EPSS 0.88%
Last modified
CVE-2021-3632 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A flaw was found in Keycloak. This vulnerability allows anyone to register a new security device or key when there is not a device already registered for any user by using the WebAuthn password-less login flow.. EPSS estimates a 0.88% chance of exploitation in the next 30 days.
Description
A flaw was found in Keycloak. This vulnerability allows anyone to register a new security device or key when there is not a device already registered for any user by using the WebAuthn password-less login flow.
Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Redhat | Keycloak | < 15.1.0 |
| Redhat | Single Sign-On | 7.0 |
| Redhat | Single Sign-On | >= 7.4, < 7.4.9 |
References
- https://access.redhat.com/security/cve/CVE-2021-3632Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1978196Issue Tracking, Vendor Advisory
- https://github.com/keycloak/keycloak/commit/65480cb5a11630909c086f79d396004499fbd1e4Patch, Third Party Advisory
- https://github.com/keycloak/keycloak/pull/8203Issue Tracking, Patch, Third Party Advisory
- https://issues.redhat.com/browse/KEYCLOAK-18500Permissions Required, Vendor Advisory
- https://access.redhat.com/security/cve/CVE-2021-3632Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1978196Issue Tracking, Vendor Advisory
- https://github.com/keycloak/keycloak/commit/65480cb5a11630909c086f79d396004499fbd1e4Patch, Third Party Advisory
- https://github.com/keycloak/keycloak/pull/8203Issue Tracking, Patch, Third Party Advisory
- https://issues.redhat.com/browse/KEYCLOAK-18500Permissions Required, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-3632?
A flaw was found in Keycloak. This vulnerability allows anyone to register a new security device or key when there is not a device already registered for any user by using the WebAuthn password-less login flow.
How severe is CVE-2021-3632?
CVE-2021-3632 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.88% probability of exploitation in the next 30 days.
How do I fix CVE-2021-3632?
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-2021-3632?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST