CVE-2023-6927
Keycloak: open redirect via "form_post.jwt" jarm response mode
CVSS Score
4.6
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-601 |
| Vendor | red hat |
| Product | red hat build of keycloak 22 |
| Published | Dec 18, 2023 |
| Last Updated | Nov 11, 2025 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
Red Hat / Red Hat build of Keycloak 22
All versions affected Red Hat / Red Hat build of Keycloak 22.0.8
All versions affected Red Hat / Red Hat Single Sign-On 7
All versions affected Red Hat / Red Hat Single Sign-On 7.6 for RHEL 7
All versions affected Red Hat / Red Hat Single Sign-On 7.6 for RHEL 7
All versions affected Red Hat / Red Hat Single Sign-On 7.6 for RHEL 8
All versions affected Red Hat / Red Hat Single Sign-On 7.6 for RHEL 8
All versions affected Red Hat / Red Hat Single Sign-On 7.6 for RHEL 9
All versions affected Red Hat / Red Hat Single Sign-On 7.6 for RHEL 9
All versions affected Red Hat / RHEL-8 based Middleware Containers
All versions affected Red Hat / RHEL-8 based Middleware Containers
All versions affected Red Hat / Single Sign-On 7.6.6
All versions affected References
access.redhat.com: https://access.redhat.com/errata/RHSA-2024:0094 access.redhat.com: https://access.redhat.com/errata/RHSA-2024:0095 access.redhat.com: https://access.redhat.com/errata/RHSA-2024:0096 access.redhat.com: https://access.redhat.com/errata/RHSA-2024:0097 access.redhat.com: https://access.redhat.com/errata/RHSA-2024:0098 access.redhat.com: https://access.redhat.com/errata/RHSA-2024:0100 access.redhat.com: https://access.redhat.com/errata/RHSA-2024:0101 access.redhat.com: https://access.redhat.com/errata/RHSA-2024:0798 access.redhat.com: https://access.redhat.com/errata/RHSA-2024:0799 access.redhat.com: https://access.redhat.com/errata/RHSA-2024:0800 access.redhat.com: https://access.redhat.com/errata/RHSA-2024:0801 access.redhat.com: https://access.redhat.com/errata/RHSA-2024:0804 access.redhat.com: https://access.redhat.com/security/cve/CVE-2023-6927 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2255027
Credits
Red Hat would like to thank Pontus Hanssen ([email protected]) for reporting this issue.