CVE-2023-6134
Keycloak: reflected xss via wildcard in oidc redirect_uri
CVSS Score
4.6
EPSS Score
0.0%
EPSS Percentile
0th
A flaw was found in Keycloak that prevents certain schemes in redirects, but permits them if a wildcard is appended to the token. This issue could allow an attacker to submit a specially crafted request leading to cross-site scripting (XSS) or further attacks. This flaw is the result of an incomplete fix for CVE-2020-10748.
| CWE | CWE-79 |
| Vendor | red hat |
| Product | red hat build of keycloak 22 |
| Published | Dec 14, 2023 |
| Last Updated | Feb 25, 2026 |
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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
All versions affected Red Hat / Red Hat build of Keycloak 22
All versions affected Red Hat / Red Hat build of Keycloak 22.0.7
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 / 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-2023:7854 access.redhat.com: https://access.redhat.com/errata/RHSA-2023:7855 access.redhat.com: https://access.redhat.com/errata/RHSA-2023:7856 access.redhat.com: https://access.redhat.com/errata/RHSA-2023:7857 access.redhat.com: https://access.redhat.com/errata/RHSA-2023:7858 access.redhat.com: https://access.redhat.com/errata/RHSA-2023:7860 access.redhat.com: https://access.redhat.com/errata/RHSA-2023:7861 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-2023-6134 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2249673
Credits
Red Hat would like to thank Lauritz Holtmann (https://security.lauritz-holtmann.de/) for reporting this issue.