CVE-2023-6927

Keycloak: open redirect via "form_post.jwt" jarm response mode

Published Dec 18, 2023 CVSS 3.1 · 4.6 Medium EPSS 1.1% KEV · Not listed
Description
A flaw was found in Keycloak. This issue may allow an attacker to steal authorization codes or tokens from clients using a wildcard in the JARM response mode "form_post.jwt" which could be used to bypass the security patch implemented to address CVE-2023-6134.

Remediation

Vendor Workaround

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2024-0318 A flaw was found in Keycloak. This issue may allow an attacker to steal authorization codes or tokens from clients using a wildcard in the JARM response mode "form_post.jwt" which could be used to bypass the security patch implemented to address CVE-2023-6134.
Github GHSA Github GHSA GHSA-9vm7-v8wj-3fqw keycloak-core: open redirect via "form_post.jwt" JARM response mode
History

No history.

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Sep 22, 2026, 3:36 AM
Reserved
Dec 18, 2023, 3:44 PM
Status
Modified
Published
Dec 18, 2023, 11:15 PM
Modified
Sep 22, 2026, 4:17 AM
Severity
Moderate
Public date
Dec 18, 2023, 12:00 AM