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

6 CVSS

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2023-6717

Check My Exposure

Credits & Attribution

No credits recorded in the NVD database.

References

More from Unknown

View All →

CVE-2025-9978

Jeg Elementor Kit < 2.7.0 - Author+ Stored XSS

Unknown 0

CVE-2025-9959

Sandbox escape in smolagents Local Python execution environment via dunder attributes

High 7.6

CVE-2025-9900

Libtiff: libtiff write-what-where

High 8.8

CVE-2025-9784

Undertow: undertow madeyoureset http/2 ddos vulnerability

High 7.5

CVE-2025-9710

Responsive Lightbox & Gallery < 2.5.3 - Unauthenticated Stored-XSS via Comments

Unknown 0

Affected Vendor

Unknown

View all reports →

Affected Software

Red Hat AMQ Broker 7, Red Hat build of Keycloak 22, Red Hat build of Keycloak 22.0.10, RHOSS-1.33-RHEL-8, RHPAM 7.13.5 async, Migration Toolkit for Applications 6, Migration Toolkit for Applications 7, Red Hat build of Apicurio Registry 2, Red Hat build of Quarkus, Red Hat Data Grid 8, Red Hat Decision Manager 7, Red Hat Developer Hub, Red Hat Fuse 7, Red Hat JBoss Data Grid 7, Red Hat JBoss Enterprise Application Platform 6, Red Hat JBoss Enterprise Application Platform 7, Red Hat JBoss Enterprise Application Platform 8, Red Hat JBoss Enterprise Application Platform Expansion Pack, Red Hat OpenShift GitOps, Red Hat Process Automation 7, Red Hat Single Sign-On 7

Vulnerable Versions:

0, 24.0.0, 22.0.10-1, 22-13, 22-16, 1.33.0-5, 1.33.0-3