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CVE-2021-4133

Good to know:

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Date: January 25, 2022

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.

Language: Java

Severity Score

Related Resources (7)

https://bugzilla.redhat.com/show_bug.cgi?id=2033602
https://github.com/keycloak/keycloak/security/advisories/GHSA-83x4-9cwr-5487
https://github.com/keycloak/keycloak/issues/9247
https://www.oracle.com/security-alerts/cpuapr2022.html
https://nvd.nist.gov/vuln/detail/CVE-2021-4133
https://github.com/keycloak/keycloak
https://www.mend.io/vulnerability-database/CVE-2021-4133

Severity Score

Weakness Type (CWE)

Incorrect Authorization

CWE-863

Top Fix

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Upgrade Version

Upgrade to version org.keycloak:keycloak-services:15.1.1

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): SINGLE
Confidentiality (C): PARTIAL
Integrity (I): PARTIAL
Availability (A): PARTIAL
Additional information:

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