CVE Feed

    Dashboard / CVE / CVE-2023-6291

    CVE-2023-6291

    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.

    Published:Dec 14, 2023
    Last Modified:Nov 11, 2025
    EPS:Jan 26, 2024
    EPSS Score:0.00196
    CVSS Score:7.1

    Affected Products

    Vendor
    Redhat
    Product
    Build Keycloak
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Jboss Data Grid
    Vendor
    Redhat
    Product
    Jboss Enterprise Application Platform
    Vendor
    Redhat
    Product
    Jboss Enterprise Bpms Platform
    Vendor
    Redhat
    Product
    Jboss Enterprise Brms Platform
    Vendor
    Redhat
    Product
    Jboss Fuse
    Vendor
    Redhat
    Product
    Keycloak
    Vendor
    Redhat
    Product
    Migration Toolkit Applications
    Vendor
    Redhat
    Product
    Migration Toolkit For Applications
    Vendor
    Redhat
    Product
    Openshift Container Platform
    Vendor
    Redhat
    Product
    Openshift Container Platform For Ibm Z
    Vendor
    Redhat
    Product
    Openshift Container Platform For Linuxone
    Vendor
    Redhat
    Product
    Openshift Container Platform For Power
    Vendor
    Redhat
    Product
    Red Hat Single Sign On
    Vendor
    Redhat
    Product
    Rhosemc
    Vendor
    Redhat
    Product
    Serverless
    Vendor
    Redhat
    Product
    Single Sign-on

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-178 Cross-Site Flashing

    Related CVEs

    CVE-2026-88770 (CVSS 6.5) — A flaw was found in the Device Authorization Grant flow of Keycloak, an identity and access management solutio…
    CVE-2026-19729 (CVSS 4.9) — A flaw was found in the key provider component of the keycloak-services library, which is the core engine for …
    CVE-2026-17615 (CVSS 7.5) — A flaw was found in RESTEasy's SourceProvider. This vulnerability allows an unauthenticated attacker to perfor…
    CVE-2026-82968 (CVSS 6.4) — A flaw was found in the first-broker-login flow of the Keycloak identity management service. When a user links…
    CVE-2026-19611 (CVSS 7.4) — A flaw was found in WildFly Elytron. Password hashing and verification normalize input with Unicode NFKC, whic…
    CVE-2026-15571 (CVSS 7.3) — A flaw was found in the legacy client-initiated account-linking endpoint of Keycloak, a widely used open-sourc…
    CVE-2026-79652 (CVSS 5.9) — A flaw was found in the JWT Bearer authorization grant implementation within the keycloak-services component o…
    CVE-2026-18963 (CVSS 9.1) — A flaw was found in the reset-credentials flow of the keycloak-services component, which is the core engine fo…
    CVE-2026-19608 (CVSS 5.3) — A flaw was found in the group policy provider of Keycloak authorization services, which is used to manage fine…
    CVE-2026-16443 (CVSS 7.4) — A flaw was found in the SAML metadata import functionality of the keycloak-services component, which is the co…

    References

    https://access.redhat.com/errata/RHSA-2023:7854
    https://access.redhat.com/errata/RHSA-2023:7855
    https://access.redhat.com/errata/RHSA-2023:7856
    https://access.redhat.com/errata/RHSA-2023:7857
    https://access.redhat.com/errata/RHSA-2023:7858
    https://access.redhat.com/errata/RHSA-2023:7860
    https://access.redhat.com/errata/RHSA-2023:7861
    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-2023-6291
    https://bugzilla.redhat.com/show_bug.cgi?id=2251407
    https://access.redhat.com/errata/RHSA-2023:7854
    https://access.redhat.com/errata/RHSA-2023:7855
    https://access.redhat.com/errata/RHSA-2023:7856
    https://access.redhat.com/errata/RHSA-2023:7857
    https://access.redhat.com/errata/RHSA-2023:7858
    https://access.redhat.com/errata/RHSA-2023:7860
    https://access.redhat.com/errata/RHSA-2023:7861
    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-2023-6291
    https://bugzilla.redhat.com/show_bug.cgi?id=2251407

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High