# CVE-2023-6717: Keycloak: xss via assertion consumer service url in saml post-binding flow

Status: published. Published: 2024-04-25. Updated: 2026-11-05.

A flaw was found in the SAML client registration in Keycloak that could allow an administrator to register malicious JavaScript URIs as Assertion Consumer Service POST Binding URLs (ACS), posing a Cross-Site Scripting (XSS) risk. This issue may allow a malicious admin in one realm or a client with registration access to target users in different realms or applications, executing arbitrary JavaScript in their contexts upon form submission. This can enable unauthorized access and harmful actions, compromising the confidentiality, integrity, and availability of the complete KC instance.

## Remediation

No remediation reported in collected sources

## Affected products and versions

-  /  (keycloak): ≥ 0; < 22.0.10 (affected, maven); ≥ 24.0.0; < 24.0.3 (affected, maven). Source: CNA: redhat
- Red Hat / Red Hat AMQ Broker 7 (keycloak): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat build of Keycloak 22 (rhbk/keycloak-operator-bundle): ≥ 22.0.10-1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat build of Keycloak 22 (rhbk/keycloak-rhel9): ≥ 22-13; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat build of Keycloak 22 (rhbk/keycloak-rhel9-operator): ≥ 22-16; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat build of Keycloak 22.0.10 (keycloak): Version range not reported. Source: CNA: redhat
- Red Hat / RHOSS-1.33-RHEL-8 (openshift-serverless-1/logic-data-index-ephemeral-rhel8): ≥ 1.33.0-5; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / RHOSS-1.33-RHEL-8 (openshift-serverless-1/logic-data-index-postgresql-rhel8): ≥ 1.33.0-5; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / RHOSS-1.33-RHEL-8 (openshift-serverless-1/logic-jobs-service-ephemeral-rhel8): ≥ 1.33.0-5; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / RHOSS-1.33-RHEL-8 (openshift-serverless-1/logic-jobs-service-postgresql-rhel8): ≥ 1.33.0-5; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / RHOSS-1.33-RHEL-8 (openshift-serverless-1/logic-kn-workflow-cli-artifacts-rhel8): ≥ 1.33.0-5; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / RHOSS-1.33-RHEL-8 (openshift-serverless-1/logic-operator-bundle): ≥ 1.33.0-5; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / RHOSS-1.33-RHEL-8 (openshift-serverless-1/logic-rhel8-operator): ≥ 1.33.0-3; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / RHOSS-1.33-RHEL-8 (openshift-serverless-1/logic-swf-builder-rhel8): ≥ 1.33.0-5; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / RHOSS-1.33-RHEL-8 (openshift-serverless-1/logic-swf-devmode-rhel8): ≥ 1.33.0-5; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / RHPAM 7.13.5 async: Version range not reported. Source: CNA: redhat
- Red Hat / Migration Toolkit for Applications 6 (mta/mta-ui-rhel9): Version range not reported. Source: CNA: redhat
- Red Hat / Migration Toolkit for Applications 7 (mta/mta-ui-rhel9): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat build of Apicurio Registry 2 (keycloak): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat build of Quarkus (keycloak-core): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Data Grid 8 (keycloak): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Decision Manager 7 (keycloak): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Developer Hub 1 (rhdh/rhdh-hub-rhel9): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Fuse 7 (keycloak): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat JBoss Data Grid 7 (keycloak): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 6 (keycloak): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 6 (org.keycloak-keycloak-parent): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 6 (rh-sso7-keycloak): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 7 (keycloak): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 8 (keycloak): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform Expansion Pack (keycloak): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat OpenShift GitOps (openshift-gitops-1/gitops-rhel8-operator): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Process Automation 7 (keycloak): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Single Sign-On 7 (rh-sso7-keycloak): Version range not reported. Source: CNA: redhat

## Severity and prioritization

- CVSS 3.1: 6 (medium); CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:L; source: CNA: redhat

- CISA KEV: No listing in collected sources

- EPSS: 0.71% as of 2026-11-04; percentile 53.67%

- SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-79

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://access.redhat.com/errata/RHSA-2024:1353 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2024:1867 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2024:1868 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2024:2945 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2024:4057 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/security/cve/CVE-2023-6717 (CNA: redhat; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2253952 (CNA: redhat; issue-tracking, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2024:1867 (ADP: CVE; vendor-advisory, x_refsource_REDHAT, x_transferred)

- https://access.redhat.com/errata/RHSA-2024:1868 (ADP: CVE; vendor-advisory, x_refsource_REDHAT, x_transferred)

- https://access.redhat.com/errata/RHSA-2024:2945 (ADP: CVE; vendor-advisory, x_refsource_REDHAT, x_transferred)

- https://access.redhat.com/errata/RHSA-2024:4057 (ADP: CVE; vendor-advisory, x_refsource_REDHAT, x_transferred)

- https://access.redhat.com/security/cve/CVE-2023-6717 (ADP: CVE; vdb-entry, x_refsource_REDHAT, x_transferred)

- https://bugzilla.redhat.com/show_bug.cgi?id=2253952 (ADP: CVE; issue-tracking, x_refsource_REDHAT, x_transferred)

## Provenance

- CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2023-6717; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2023-6717; retrieved 2026-11-05; source updated Not reported

Revision: 2bb90d37dc138cf4b27a52186634e244a04bdf962f8f398bf340604bd203bd5a

Canonical: https://y2.dev/cve/CVE-2023-6717

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