BlackTreeIndependent security intelligence
← Back to the CVE catalogue
Full vulnerability report · 2024
CVE-2023-6717High confidence

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

Unknown · Unknown

6.0MediumCVSS 3.1
Recommended action
Scheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current
CVE-2023-6717 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitykeycloak: XSS via assertion consumer service URL in SAML POST-binding flow
12 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • mta/mta-ui-rhel9 as a component of Migration Toolkit for Applications 6
  • keycloak as a component of Red Hat build of Apicurio Registry 2
  • keycloak as a component of Red Hat Data Grid 8
  • keycloak as a component of Red Hat Decision Manager 7
  • keycloak as a component of Red Hat Fuse 7
  • keycloak as a component of Red Hat JBoss Data Grid 7
  • keycloak as a component of Red Hat JBoss Enterprise Application Platform 6
  • org.keycloak-keycloak-parent as a component of Red Hat JBoss Enterprise Application Platform 6
  • rh-sso7-keycloak as a component of Red Hat JBoss Enterprise Application Platform 6
  • openshift-gitops-1/gitops-rhel8-operator as a component of Red Hat OpenShift GitOps
  • keycloak as a component of Red Hat Process Automation 7
  • rh-sso7-keycloak as a component of Red Hat Single Sign-On 7
Summary
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
See the Red Hat OpenShift serverless 1.33 documentation at: https://access.redhat.com/documentation/en-us/red_hat_openshift_serverless/1.33
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2024-1164

No EUVD known-exploited evidence

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.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
6.0 · CVSS 3.1
Advisory evidence
No linked advisory details stored yet
Recommended actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
01

What, why and how

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.

What

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.

Why

Attacker-controlled content can reach a browser as executable script without sufficient output encoding or sanitisation.

How

An attacker operating through a network path may attempt exploitation with elevated privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

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.

Why

Attacker-controlled content can reach a browser as executable script without sufficient output encoding or sanitisation.

How

An attacker operating through a network path may attempt exploitation with elevated privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
High: elevated access is required
User interaction
Required interaction required
Attack complexity
High: exploitation depends on specific conditions
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-79 ↗

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'). The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:L

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACHighAttack complexity: Successful exploitation depends on specific conditions outside the attacker's direct control.PRHighPrivileges required: The attacker needs elevated or administrative privileges.UIRequiredUser interaction: Another user must perform an action for exploitation to succeed.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.ALowAvailability impact: A successful attack can cause a limited loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkCWE-79
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2024-1164Official EUVD mapping

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.

Official EUVD record
BSI · German · WID-SEC-W-2024-0914Red Hat Enterprise Linux (keycloak): Mehrere Schwachstellen

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Red Hat Enterprise Linux ausnutzen, um Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen, Cross-Site Scripting (XSS)-Angriffe durchzuführen oder einen Denial-of-Service-Zustand zu verursachen.

Official advisory
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
mta/mta-ui-rhel9 as a component of Migration Toolkit for Applications 6; keycloak as a component of Red Hat build of Apicurio Registry 2; keycloak as a component of Red Hat Data Grid 8; keycloak as a component of Red Hat Decision Manager 7; keycloak as a component of Red Hat Fuse 7; keycloak as a component of Red Hat JBoss Data Grid 7; keycloak as a component of Red Hat JBoss Enterprise Application Platform 6; org.keycloak-keycloak-parent as a component of Red Hat JBoss Enterprise Application Platform 6; rh-sso7-keycloak as a component of Red Hat JBoss Enterprise Application Platform 6; openshift-gitops-1/gitops-rhel8-operator as a component of Red Hat OpenShift GitOps; keycloak as a component of Red Hat Process Automation 7; rh-sso7-keycloak as a component of Red Hat Single Sign-On 7
Fixed
openshift-serverless-1/logic-data-index-ephemeral-rhel8@sha256:1d4c65ddd65b54b387f21bdabf408d180bcc0d835fec714a2c06b643187279de_ppc64le as a component of Red Hat OpenShift Serverless 1.33; openshift-serverless-1/logic-data-index-ephemeral-rhel8@sha256:2223754df4f475fc7240df4d833c3ad3d757375ceb2dba359164bd6e8475d267_arm64 as a component of Red Hat OpenShift Serverless 1.33; openshift-serverless-1/logic-data-index-ephemeral-rhel8@sha256:90938287390c5d53dd8311699daa4304444e0727fa1aed18e6b4712ef2da8ee4_amd64 as a component of Red Hat OpenShift Serverless 1.33; openshift-serverless-1/logic-data-index-postgresql-rhel8@sha256:1050e0b388b09c494bcb2f9bc9d74eb1f12b1ef93218e3920434f7c09b22f9eb_ppc64le as a component of Red Hat OpenShift Serverless 1.33; openshift-serverless-1/logic-data-index-postgresql-rhel8@sha256:d6951064cd3ac48107a93d9d21df106157df0232645bb2d847589fda496b5c9a_arm64 as a component of Red Hat OpenShift Serverless 1.33; openshift-serverless-1/logic-data-index-postgresql-rhel8@sha256:f188dc873609058aa3a4911526df0afc1f32c8b986c02646b403932750db5d19_amd64 as a component of Red Hat OpenShift Serverless 1.33; openshift-serverless-1/logic-jobs-service-ephemeral-rhel8@sha256:1b186d5cd499f69de3f9b6053092ce1e634ac4101c8dec5bbae664a0405ec4a3_amd64 as a component of Red Hat OpenShift Serverless 1.33; openshift-serverless-1/logic-jobs-service-ephemeral-rhel8@sha256:2664e7f4c310f561e254f1b07a1f189e8c674556545d27f3e108358f04258979_arm64 as a component of Red Hat OpenShift Serverless 1.33; openshift-serverless-1/logic-jobs-service-ephemeral-rhel8@sha256:40893aa91a3cbbe99aa0e47032e64e31c176d0b857a3fe36151668f87ed1b346_ppc64le as a component of Red Hat OpenShift Serverless 1.33; openshift-serverless-1/logic-jobs-service-postgresql-rhel8@sha256:19c9009a5f3a73553ebbb0a34063a9236635d41f9457de150d12f8b1c9d9a80e_arm64 as a component of Red Hat OpenShift Serverless 1.33; openshift-serverless-1/logic-jobs-service-postgresql-rhel8@sha256:a7fc943642f5272d25292a25bfd6d2a35ef30e5f9a7419f935988a764741ba57_ppc64le as a component of Red Hat OpenShift Serverless 1.33; openshift-serverless-1/logic-jobs-service-postgresql-rhel8@sha256:ed0f3c6feaed07a6f2ce2774fdb2ec96aa4855426396a39350289528794818bc_amd64 as a component of Red Hat OpenShift Serverless 1.33; openshift-serverless-1/logic-kn-workflow-cli-artifacts-rhel8@sha256:32613823ccf9bba0b8bb586b9859c4b68b548953445ee221907bedf1841a1dc9_amd64 as a component of Red Hat OpenShift Serverless 1.33; openshift-serverless-1/logic-kn-workflow-cli-artifacts-rhel8@sha256:ab13f02335cf4f22b72d7a477b1de9c3634b2a6d66ddc536192d0061d7f572d5_arm64 as a component of Red Hat OpenShift Serverless 1.33; openshift-serverless-1/logic-operator-bundle@sha256:8309ccf050075499e5052a6af4ecfd53755636663a2ec0f4f0e94e9e6ddc251f_arm64 as a component of Red Hat OpenShift Serverless 1.33; openshift-serverless-1/logic-operator-bundle@sha256:e405a41d8c91661bae11aadc0a79490e3bc8ef278fc15c2dc2f026b300af1775_ppc64le as a component of Red Hat OpenShift Serverless 1.33; openshift-serverless-1/logic-operator-bundle@sha256:f4495c801002a4501b6b472a2f709cf6f7e0955b74d407254f4aa00a5c26932c_amd64 as a component of Red Hat OpenShift Serverless 1.33; openshift-serverless-1/logic-rhel8-operator@sha256:8fcf378e87a1eb66dd3906edff827ed55e5d991eb6961bf1d101eacfaaaeec40_amd64 as a component of Red Hat OpenShift Serverless 1.33; openshift-serverless-1/logic-rhel8-operator@sha256:e113674a0ce7abadb084823420724af4f97a7e109cfe921bad907e5d1cd46dca_ppc64le as a component of Red Hat OpenShift Serverless 1.33; openshift-serverless-1/logic-rhel8-operator@sha256:fbff2eb7134a4f3b3aff8ac3768981fcabd11aff983a366948ac75816c26a5b9_arm64 as a component of Red Hat OpenShift Serverless 1.33; openshift-serverless-1/logic-swf-builder-rhel8@sha256:278dc04865d985aba56ff0a6e6a2aa2fdce544459cab642dacb6e8de948a19aa_arm64 as a component of Red Hat OpenShift Serverless 1.33; openshift-serverless-1/logic-swf-builder-rhel8@sha256:35a03270b6f2908fd611f4e1eeb4fdc3d44ac82bb6dc188a03bb134d86def8f4_amd64 as a component of Red Hat OpenShift Serverless 1.33; openshift-serverless-1/logic-swf-builder-rhel8@sha256:b4a682402e78ad34e16ab038771f51205a7c117de49bb8f585eb7a0bfa59a586_ppc64le as a component of Red Hat OpenShift Serverless 1.33; openshift-serverless-1/logic-swf-devmode-rhel8@sha256:0fa9ee1c7cd198e83187511f24084661cbbaa3f4d6a496e3ead0349a672fc5d0_ppc64le as a component of Red Hat OpenShift Serverless 1.33; openshift-serverless-1/logic-swf-devmode-rhel8@sha256:a24194315193f8d7e46f7c2862b88356c2e676287503cc58dbad629f0f196496_amd64 as a component of Red Hat OpenShift Serverless 1.33; openshift-serverless-1/logic-swf-devmode-rhel8@sha256:f98022ead7f3708016d5815be0d637a22f288af66b6f4a6be906afd7ce7514ca_arm64 as a component of Red Hat OpenShift Serverless 1.33; rhbk/keycloak-operator-bundle@sha256:a47cee9b95ed78d7895c2582772abe3ccf239259ee3fbc2d7df8594450dc32f9_amd64 as a component of Red Hat build of Keycloak 22; rhbk/keycloak-rhel9-operator@sha256:06aa39709dbbd870a14be493bdd452243f700d2910072044ea0d7f8e4abe50b2_amd64 as a component of Red Hat build of Keycloak 22; rhbk/keycloak-rhel9-operator@sha256:1f5fe6756a3767d1ca8cf3f79c9c14054012f73977602af5c1fc6c5e224fac52_ppc64le as a component of Red Hat build of Keycloak 22; rhbk/keycloak-rhel9-operator@sha256:be417b344db10adf963d1f64c94e2d214e205489e03395dc508074d783e6422e_s390x as a component of Red Hat build of Keycloak 22; and 6 more
Action
See the Red Hat OpenShift serverless 1.33 documentation at: https://access.redhat.com/documentation/en-us/red_hat_openshift_serverless/1.33
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 25 Apr 2024 · Last source change 11 Sept 2026, 01:11 UTC · CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2024-1164
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD not scheduled

Missing structured fields: affected product. Missing data is not evidence of low risk; review the primary advisory.

Material change intelligence

What changed after publication

View recent updates →

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2024-1164↗Vendor CSAF · Red Hat Product Security↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2023-6717 · cve.blacktree.nl