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    CVE-2017-12158

    It was found that Keycloak would accept a HOST header URL in the admin console and use it to determine web resource locations. An attacker could use this flaw against an authenticated user to attain reflected XSS via a malicious server.

    Published:Oct 17, 2017
    Last Modified:Apr 20, 2025
    EPS:Oct 26, 2017
    EPSS Score:0.00668
    CVSS Score:5.4

    Affected Products

    Vendor
    Keycloak
    Product
    Keycloak
    Vendor
    Redhat
    Product
    Enterprise Linux Server
    Vendor
    Redhat
    Product
    Jboss Single Sign On
    Vendor
    Redhat
    Product
    Red Hat Single Sign On
    Vendor
    Redhat
    Product
    Single Sign On

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-3429 (CVSS 4.2) — A flaw was identified in the Account REST API of Keycloak that allows a user authenticated at a lower security…
    CVE-2026-3190 (CVSS 4.3) — A flaw was found in Keycloak. The User-Managed Access (UMA) 2.0 Protection API endpoint for permission tickets…
    CVE-2026-3121 (CVSS 6.5) — A flaw was found in Keycloak. An administrator with `manage-clients` permission can exploit a misconfiguration…
    CVE-2026-2575 (CVSS 5.3) — A flaw was found in Keycloak. An unauthenticated remote attacker can trigger an application level Denial of Se…
    CVE-2026-2366 (CVSS 3.1) — A flaw was found in Keycloak. An authorization bypass vulnerability in the Keycloak Admin API allows any authe…
    CVE-2017-12161 (CVSS 8.8) — It was found that keycloak before 3.4.2 final would permit misuse of a client-side /etc/hosts entry to spoof a…
    CVE-2017-12159 (CVSS 7.5) — It was found that the cookie used for CSRF prevention in Keycloak was not unique to each session. An attacker …
    CVE-2014-3709 (CVSS 8.8) — The org.keycloak.services.resources.SocialResource.callback method in JBoss KeyCloak before 1.0.3.Final allows…
    CVE-2014-3651 (CVSS 7.5) — JBoss KeyCloak before 1.0.3.Final allows remote attackers to cause a denial of service (resource consumption) …

    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