The following advisory data is extracted from:
https://access.redhat.com/security/data/csaf/v2/advisories/2023/rhsa-2023_7860.json
Red Hat officially shut down their mailing list notifications October 10, 2023.  Due to this, Packet Storm has recreated the below data as a reference point to raise awareness.  It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.
- Packet Storm Staff
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Red Hat Security Advisory
Synopsis:           Important: Red Hat build of Keycloak 22.0.7 enhancement and security update
Advisory ID:        RHSA-2023:7860-03
Product:            Red Hat build of Keycloak
Advisory URL:       https://access.redhat.com/errata/RHSA-2023:7860
Issue date:         2023-12-14
Revision:           03
CVE Names:          CVE-2023-6134
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Summary: 
Red Hat build of Keycloak 22.0.7 is now available from the Customer Portal.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Description:
Red Hat build of Keycloak 22.0.7 is a standalone server, based on the Keycloak project, that provides authentication and standards-based single sign-on capabilities for web and mobile applications.
This release of Red Hat build of Keycloak 22.0.7 serves as a replacement for Red Hat build of Keycloak 22.0.6, and includes bug fixes, enhancements and security fixes, which are documented in the Release Notes document linked to in the References.
Security Fix(es):
* redirect_uri validation logic that allows for a bypass of otherwise explicitly allowed hosts (CVE-2023-6134)
* reflected XSS via wildcard in OIDC redirect_uri (CVE-2023-6291)
For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.
Solution:
https://access.redhat.com/documentation/en-us/red_hat_build_of_keycloak/22.0/html-single/migration_guide/
CVEs:
CVE-2023-6134
References:
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/jbossnetwork/restricted/listSoftware.html?product=rhbk&downloadType=distributions&version=22.0.7
https://bugzilla.redhat.com/show_bug.cgi?id=2249673
https://bugzilla.redhat.com/show_bug.cgi?id=2251407