CVE Feed

    Dashboard / CVE / CVE-2023-6927

    CVE-2023-6927

    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.

    Published:Dec 18, 2023
    Last Modified:Nov 11, 2025
    EPS:Dec 18, 2023
    EPSS Score:0.00563
    CVSS Score:4.6

    Affected Products

    Vendor
    Redhat
    Product
    Build Keycloak
    Vendor
    Redhat
    Product
    Keycloak
    Vendor
    Redhat
    Product
    Red Hat Single Sign On
    Vendor
    Redhat
    Product
    Rhosemc
    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-2026-89298 (CVSS 4.9) — A flaw was found in the Dynamic Client Registration service of Keycloak, an open-source identity and access ma…
    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…

    References

    https://access.redhat.com/errata/RHSA-2024:0094
    https://access.redhat.com/errata/RHSA-2024:0095
    https://access.redhat.com/errata/RHSA-2024:0096
    https://access.redhat.com/errata/RHSA-2024:0097
    https://access.redhat.com/errata/RHSA-2024:0098
    https://access.redhat.com/errata/RHSA-2024:0100
    https://access.redhat.com/errata/RHSA-2024:0101
    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-2023-6927
    https://bugzilla.redhat.com/show_bug.cgi?id=2255027
    https://access.redhat.com/errata/RHSA-2024:0094
    https://access.redhat.com/errata/RHSA-2024:0095
    https://access.redhat.com/errata/RHSA-2024:0096
    https://access.redhat.com/errata/RHSA-2024:0097
    https://access.redhat.com/errata/RHSA-2024:0098
    https://access.redhat.com/errata/RHSA-2024:0100
    https://access.redhat.com/errata/RHSA-2024:0101
    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-2023-6927
    https://bugzilla.redhat.com/show_bug.cgi?id=2255027

    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