High severity8.8NVD Advisory· Published Jan 25, 2022· Updated Jun 17, 2026
CVE-2021-4133
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.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
org.keycloak:keycloak-servicesMaven | < 15.1.1 | 15.1.1 |
Affected products
3Patches
Vulnerability mechanics
References
6- bugzilla.redhat.com/show_bug.cginvdIssue TrackingThird Party AdvisoryWEB
- github.com/advisories/GHSA-83x4-9cwr-5487ghsaADVISORY
- github.com/keycloak/keycloak/issues/9247nvdThird Party AdvisoryWEB
- github.com/keycloak/keycloak/security/advisories/GHSA-83x4-9cwr-5487nvdThird Party AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2021-4133ghsaADVISORY
- www.oracle.com/security-alerts/cpuapr2022.htmlnvdNot ApplicableWEB
News mentions
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