Keycloak: xss via assertion consumer service url in saml post-binding flow

Description

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.

Timeline

Scores

EPSS (exploitation in 30 days)

0.71% · top 46% of all CVEs (7 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: total

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.0.

Weakness

• CWE-79: Improper Neutralization of Input During Web Page Generation (opens in a new tab)All about CWE-79 and its CVEs

Affected products

• keycloak

  • affected < 22.0.10
  • affected 24.0.0 – < 24.0.3

• Red Hat · Red Hat AMQ Broker 7

  All versions: unaffected

• Red Hat · Red Hat build of Keycloak 22

  • unaffected 22.0.10-1 – < *

• Red Hat · Red Hat build of Keycloak 22

  • unaffected 22-13 – < *

• Red Hat · Red Hat build of Keycloak 22

  • unaffected 22-16 – < *

• Red Hat · Red Hat build of Keycloak 22.0.10

  All versions: unaffected

• Red Hat · RHOSS-1.33-RHEL-8

  • unaffected 1.33.0-5 – < *

• Red Hat · RHOSS-1.33-RHEL-8

  • unaffected 1.33.0-5 – < *

• Red Hat · RHOSS-1.33-RHEL-8

  • unaffected 1.33.0-5 – < *

• Red Hat · RHOSS-1.33-RHEL-8

  • unaffected 1.33.0-5 – < *

• Red Hat · RHOSS-1.33-RHEL-8

  • unaffected 1.33.0-5 – < *

• Red Hat · RHOSS-1.33-RHEL-8

  • unaffected 1.33.0-5 – < *

• Red Hat · RHOSS-1.33-RHEL-8

  • unaffected 1.33.0-3 – < *

• Red Hat · RHOSS-1.33-RHEL-8

  • unaffected 1.33.0-5 – < *

• Red Hat · RHOSS-1.33-RHEL-8

  • unaffected 1.33.0-5 – < *

• Red Hat · RHPAM 7.13.5 async

  All versions: unaffected

• Red Hat · Migration Toolkit for Applications 6

  All versions: affected

• Red Hat · Migration Toolkit for Applications 7

  All versions: unaffected

• Red Hat · Red Hat build of Apicurio Registry 2

  All versions: affected

• Red Hat · Red Hat build of Quarkus

  All versions: unaffected

• Red Hat · Red Hat build of Quarkus

  All versions: unaffected

• Red Hat · Red Hat Data Grid 8

  All versions: affected

• Red Hat · Red Hat Decision Manager 7

  All versions: affected

• Red Hat · Red Hat Developer Hub 1

  All versions: unaffected

• Red Hat · Red Hat Fuse 7

  All versions: affected

• Red Hat · Red Hat JBoss Data Grid 7

  All versions: affected

• Red Hat · Red Hat JBoss Enterprise Application Platform 6

  All versions: unknown

• Red Hat · Red Hat JBoss Enterprise Application Platform 6

  All versions: unknown

• Red Hat · Red Hat JBoss Enterprise Application Platform 6

  All versions: unknown

• Red Hat · Red Hat JBoss Enterprise Application Platform 7

  All versions: unaffected

• Red Hat · Red Hat JBoss Enterprise Application Platform 8

  All versions: unaffected

• Red Hat · Red Hat JBoss Enterprise Application Platform Expansion Pack

  All versions: unaffected

• Red Hat · Red Hat OpenShift GitOps

  All versions: affected

• Red Hat · Red Hat Process Automation 7

  All versions: affected

• Red Hat · Red Hat Single Sign-On 7

  All versions: affected

Affected packages

From reviewed advisories of the GitHub Advisory Database.

• Mavenorg.keycloak:keycloak-servicesGHSA-8rmm-gm28-pj8q (opens in a new tab)

References (7)

• RHSA-2024:1353 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
• RHSA-2024:1867 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2024:1868 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2024:2945 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2024:4057 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• https://access.redhat.com/security/cve/CVE-2023-6717 (opens in a new tab)vdb-entryx_refsource_REDHATx_transferred
• RHBZ#2253952 (opens in a new tab)issue-trackingx_refsource_REDHATx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisory GHSA-8rmm-gm28-pj8q (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2023-6717](https://trackcve.app/badge/CVE-2023-6717.svg)](https://trackcve.app/cve/CVE-2023-6717)

Record last updated 5 Nov 2026, 11:37 UTC.