CVE-2023-6717
Keycloak: xss via assertion consumer service url in saml post-binding flow
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- High
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
Keycloak: xss via assertion consumer service url in saml post-binding flow
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.
- Record
CVE-2023-6717- CVSS 3.1
- 6.0 Medium
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:L - Weakness
- CWE-79
- Updated
- 2026-11-05
EUVDEUVD-2024-1164
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.
- Record
EUVD-2024-1164- CVSS 3.1
- 6.0 Medium
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:L - Updated
- 2026-11-05
GitHub AdvisoriesGHSA-8rmm-gm28-pj8q
Keycloak Cross-site Scripting (XSS) via assertion consumer service URL in SAML POST-binding flow
Keycloak allows arbitrary URLs as SAML Assertion Consumer Service POST Binding URL (ACS), including JavaScript URIs (javascript:).
Allowing JavaScript URIs in combination with HTML forms leads to JavaScript evaluation in the context of the embedding origin on form submission.
Acknowledgements:
Special thanks to Lauritz Holtmann for reporting this issue and helping us improve our project.
- Record
GHSA-8rmm-gm28-pj8q- CVSS 3.1
- 6.0 Medium
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:L - Weakness
- CWE-20, CWE-79, CWE-601
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2023-6717- CVSS 3.1
- 6.0 Medium
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:L - Weakness
- CWE-79
- Updated
- 2026-11-05
OSV
Keycloak: xss via assertion consumer service url in saml post-binding flow
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.
- Record
CVE-2023-6717- CVSS 3.1
- 6.0 Medium
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:L - Weakness
- CWE-79
- Updated
- 2026-11-07
OSVGHSA-8rmm-gm28-pj8q
Keycloak Cross-site Scripting (XSS) via assertion consumer service URL in SAML POST-binding flow
Keycloak allows arbitrary URLs as SAML Assertion Consumer Service POST Binding URL (ACS), including JavaScript URIs (javascript:).
Allowing JavaScript URIs in combination with HTML forms leads to JavaScript evaluation in the context of the embedding origin on form submission.
Acknowledgements:
Special thanks to Lauritz Holtmann for reporting this issue and helping us improve our project.
- Record
GHSA-8rmm-gm28-pj8q- CVSS 3.1
- 6.0 Medium
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:L - Weakness
- CWE-20, CWE-601, CWE-79
- Updated
- 2026-11-02
Affected products
- red hat migration toolkit for applications 6
- red hat migration toolkit for applications 7
- red hat amq broker 7
- red hat build of apicurio registry 2
- red hat build of keycloak 22
- red hat build of keycloak 22.0.10
- red hat build of quarkus
- red hat data grid 8
- red hat decision manager 7
- red hat developer hub 1
- red hat fuse 7
- red hat jboss data grid 7
Show 9 moreShow less
- 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
- red hat rhoss-1.33-rhel-8
- red hat rhpam 7.13.5 async
Affected packages
| Package | Affected | Fixed |
|---|---|---|
org.keycloak:keycloak-servicesMaven |
before 22.0.10 | 22.0.10 |
org.keycloak:keycloak-servicesMaven |
23.0.0 up to 24.0.3 | 24.0.3 |
org.keycloak:keycloak-servicesMaven |
before 22.0.10, plus listed versions 1.0-alpha-11.0-alpha-1-120620131.0-alpha-21.0-alpha-31.0-alpha-4 Show 45 moreShow less1.0-beta-11.0-beta-1-201505211.0-beta-1-201505231.0-beta-21.0-beta-31.0-beta-41.0-final1.0-rc-11.0-rc-21.0.1.Final1.0.2.Final1.0.3.Final1.0.4.Final1.0.5.Final1.1.0.Beta11.1.0.Beta21.1.0.Final1.1.1.Final1.2.0.Beta11.2.0.CR11.2.0.Final1.3.0.Final1.3.1.Final1.4.0.Final1.5.0-Final1.5.0.Final1.5.1.Final1.6.0.Final1.6.1.Final1.7.0.CR11.7.0.Final1.8.0.Alpha11.8.0.CR11.8.0.CR21.8.0.CR31.8.0.Final1.8.1.Final1.9.0.CR11.9.0.Final1.9.1.Final1.9.2.Final1.9.3.Final1.9.4.Final1.9.5.Final1.9.7.Final |
22.0.10 |
org.keycloak:keycloak-servicesMaven |
23.0.0 up to 24.0.3, plus listed versions 23.0.123.0.223.0.323.0.423.0.5 Show 5 moreShow less23.0.623.0.724.0.024.0.124.0.2 |
24.0.3 |
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | EUVD | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-6717 is a medium vulnerability (CVSS 6.0) in Red Hat Migration Toolkit For Applications 6, published April 17, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.71%, the 53rd percentile. Fixed in org.keycloak:keycloak-services 22.0.10.
References
access.redhat.com/errata/RHSA-2024:1353
Show 9 moreShow less
bugzilla.redhat.com/show_bug.cgi?id=2253952
github.com/keycloak/keycloak/security/advisories/GHSA-8rmm-gm28-pj8q
nvd.nist.gov/vuln/detail/CVE-2023-6717
catalog.redhat.com/software/containers
Left out here: 110 versions. The JSON record has them.