CVE-2023-6291

Keycloak: redirect_uri validation bypass

Description

A flaw was found in the redirect_uri validation logic in Keycloak. This issue may allow a bypass of otherwise explicitly allowed hosts. A successful attack may lead to an access token being stolen, making it possible for the attacker to impersonate other users.

Remediation

Workaround:

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

Category

7.1
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.13%
Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com
Affected: Red Hat Red Hat build of Keycloak 22
Affected: Red Hat Red Hat build of Keycloak 22
Affected: Red Hat Red Hat build of Keycloak 22
Affected: Red Hat Red Hat build of Keycloak 22.0.7
Affected: Red Hat Red Hat Single Sign-On 7
Affected: Red Hat Red Hat Single Sign-On 7.6 for RHEL 7
Affected: Red Hat Red Hat Single Sign-On 7.6 for RHEL 7
Affected: Red Hat Red Hat Single Sign-On 7.6 for RHEL 8
Affected: Red Hat Red Hat Single Sign-On 7.6 for RHEL 8
Affected: Red Hat Red Hat Single Sign-On 7.6 for RHEL 9
Affected: Red Hat Red Hat Single Sign-On 7.6 for RHEL 9
Affected: Red Hat RHEL-8 based Middleware Containers
Affected: Red Hat RHEL-8 based Middleware Containers
Affected: Red Hat RHEL-8 based Middleware Containers
Affected: Red Hat Single Sign-On 7.6.6
Affected: Red Hat Migration Toolkit for Applications 6
Affected: Red Hat Migration Toolkit for Applications 7
Affected: Red Hat OpenShift Serverless
Affected: Red Hat Red Hat Data Grid 8
Affected: Red Hat Red Hat Decision Manager 7
Affected: Red Hat Red Hat Fuse 7
Affected: Red Hat Red Hat JBoss Data Grid 7
Affected: Red Hat Red Hat JBoss Enterprise Application Platform 6
Affected: Red Hat Red Hat Process Automation 7
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/errata/RHSA-2023:7854 vendor advisory
https://access.redhat.com/errata/RHSA-2023:7855 vendor advisory
https://access.redhat.com/errata/RHSA-2023:7856 vendor advisory
https://access.redhat.com/errata/RHSA-2023:7857 vendor advisory
https://access.redhat.com/errata/RHSA-2023:7858 vendor advisory
https://access.redhat.com/errata/RHSA-2023:7860 vendor advisory
https://access.redhat.com/errata/RHSA-2023:7861 vendor advisory
https://access.redhat.com/errata/RHSA-2024:0798 vendor advisory
https://access.redhat.com/errata/RHSA-2024:0799 vendor advisory
https://access.redhat.com/errata/RHSA-2024:0800 vendor advisory
https://access.redhat.com/errata/RHSA-2024:0801 vendor advisory
https://access.redhat.com/errata/RHSA-2024:0804 vendor advisory
https://access.redhat.com/security/cve/CVE-2023-6291 vdb entry vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2251407 vendor advisory issue tracking

Frequently Asked Questions

What is the severity of CVE-2023-6291?
CVE-2023-6291 has been scored as a high severity vulnerability.
How to fix CVE-2023-6291?
As a workaround for remediating CVE-2023-6291: Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Is CVE-2023-6291 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-6291 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-6291?
CVE-2023-6291 affects Red Hat Red Hat build of Keycloak 22, Red Hat Red Hat build of Keycloak 22, Red Hat Red Hat build of Keycloak 22, Red Hat Red Hat build of Keycloak 22.0.7, Red Hat Red Hat Single Sign-On 7, Red Hat Red Hat Single Sign-On 7.6 for RHEL 7, Red Hat Red Hat Single Sign-On 7.6 for RHEL 7, Red Hat Red Hat Single Sign-On 7.6 for RHEL 8, Red Hat Red Hat Single Sign-On 7.6 for RHEL 8, Red Hat Red Hat Single Sign-On 7.6 for RHEL 9, Red Hat Red Hat Single Sign-On 7.6 for RHEL 9, Red Hat RHEL-8 based Middleware Containers, Red Hat RHEL-8 based Middleware Containers, Red Hat RHEL-8 based Middleware Containers, Red Hat Single Sign-On 7.6.6, Red Hat Migration Toolkit for Applications 6, Red Hat Migration Toolkit for Applications 7, Red Hat OpenShift Serverless, Red Hat Red Hat Data Grid 8, Red Hat Red Hat Decision Manager 7, Red Hat Red Hat Fuse 7, Red Hat Red Hat JBoss Data Grid 7, Red Hat Red Hat JBoss Enterprise Application Platform 6, Red Hat Red Hat Process Automation 7.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.