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Status published
Medium
CVE-2023-6927
Keycloak: open redirect via "form_post.jwt" jarm response mode
Vulnerability 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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:
- Red Hat would like to thank Pontus Hanssen (Pontus.Hanssen@omegapoint.se) for reporting this issue.
References
- https://access.redhat.com/errata/RHSA-2024:0094
- https://access.redhat.com/errata/RHSA-2024:0095
- https://access.redhat.com/errata/RHSA-2024:0096
- https://access.redhat.com/errata/RHSA-2024:0097
- https://access.redhat.com/errata/RHSA-2024:0098
- https://access.redhat.com/errata/RHSA-2024:0100
- https://access.redhat.com/errata/RHSA-2024:0101
- https://access.redhat.com/errata/RHSA-2024:0798
- https://access.redhat.com/errata/RHSA-2024:0799
- https://access.redhat.com/errata/RHSA-2024:0800
- https://access.redhat.com/errata/RHSA-2024:0801
- https://access.redhat.com/errata/RHSA-2024:0804
- https://access.redhat.com/security/cve/CVE-2023-6927
- https://bugzilla.redhat.com/show_bug.cgi?id=2255027
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Affected Vendor
Red Hat
View all reports →Affected Software
Red Hat build of Keycloak 22, Red Hat build of Keycloak 22.0.8, Red Hat Single Sign-On 7, Red Hat Single Sign-On 7.6 for RHEL 7, Red Hat Single Sign-On 7.6 for RHEL 8, Red Hat Single Sign-On 7.6 for RHEL 9, RHEL-8 based Middleware Containers, Single Sign-On 7.6.6
Vulnerable Versions:
22-7, 0:18.0.11-3.redhat_00001.1.el7sso, 0:18.0.12-1.redhat_00001.1.el7sso, 0:18.0.11-3.redhat_00001.1.el8sso, 0:18.0.12-1.redhat_00001.1.el8sso, 0:18.0.11-3.redhat_00001.1.el9sso, 0:18.0.12-1.redhat_00001.1.el9sso, 7.6-39, 7.6-41
Timeline
Official Publish:
December 18th, 2023
Last Modified:
November 11th, 2025
Added to House:
July 22nd, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N