cve.bz

CVE-2021-4133

8.8 highEPSS 1.4%

High (8.8) in redhat keycloak. EPSS 1.4% chance of exploitation in the next 30 days. Fixed in org.keycloak:keycloak-services 15.1.1.

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.

Severity

CVSS 3.1

8.8 high
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
1.4% chance of exploitation in the next 30 days; higher than 71% of CVEs (scores of 2026-10-31)
CWE
CWE-863
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-83x4-9cwr-5487Mavenorg.keycloak:keycloak-services<15.1.115.1.1

References

Check your stackJSON