CVE-2023-3597

Keycloak: secondary factor bypass in step-up authentication

State: Published
Severity: 5.0 Medium
Published: Apr 25, 2024
Updated: Nov 11, 2025
Reserved: Jul 10, 2023

Description

A flaw was found in Keycloak, where it does not correctly validate its client step-up authentication in org.keycloak.authentication. This flaw allows a remote user authenticated with a password to register a false second authentication factor along with an existing one and bypass authentication.

Scores

CVSS	Score	Vector	Source
3.1	5.0 Medium	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L	redhat

Weaknesses

CWE-287 Improper Authentication

Affected Products

Product	Versions
keycloak	before 22.0.10Affected 23.0.0 to before 24.0.3Affected
Red Hat build of Keycloak 22Red Hat	22.0.10-1 and laterNot affected
Red Hat build of Keycloak 22Red Hat	22-13 and laterNot affected
Red Hat build of Keycloak 22Red Hat	22-16 and laterNot affected
Red Hat build of Keycloak 22.0.10Red Hat
RHSSO 7.6.8Red Hat

References

RHSA-2024:1866vendor-advisory
RHSA-2024:1867vendor-advisory
RHSA-2024:1868vendor-advisory
https://access.redhat.com/security/cve/CVE-2023-3597vdb-entry
RHBZ#2221760issue-tracking

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