CVE-2021-4133

Description

A flaw was found in Keycloak in versions from 12.0.0 and before 15.1.1 which allows an attacker with any existing user account to create new default user accounts via the administrative REST API even when new user registration is disabled.

Category

8.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.10%
Third-Party Advisory redhat.com Third-Party Advisory github.com Third-Party Advisory github.com
Affected: n/a Keycloak
Published at:
Updated at:

References

Link Tags
https://bugzilla.redhat.com/show_bug.cgi?id=2033602 third party advisory issue tracking
https://github.com/keycloak/keycloak/issues/9247 third party advisory
https://github.com/keycloak/keycloak/security/advisories/GHSA-83x4-9cwr-5487 third party advisory
https://www.oracle.com/security-alerts/cpuapr2022.html not applicable

Frequently Asked Questions

What is the severity of CVE-2021-4133?
CVE-2021-4133 has been scored as a high severity vulnerability.
How to fix CVE-2021-4133?
To fix CVE-2021-4133, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-4133 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-4133 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-4133?
CVE-2021-4133 affects n/a Keycloak.
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