GoogleOSV:GHSA-8RMM-GM28-PJ8QKeycloak Cross-site Scripting (XSS) via assertion consumer service URL in SAML POST-binding flow
6 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
LOW
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:L
6.8 Medium
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
10.4%
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.
References
access.redhat.com/errata/RHSA-2024:1867
access.redhat.com/errata/RHSA-2024:1868
access.redhat.com/errata/RHSA-2024:2945
access.redhat.com/errata/RHSA-2024:4057
access.redhat.com/security/cve/CVE-2023-6717
bugzilla.redhat.com/show_bug.cgi?id=2253952
github.com/keycloak/keycloak
github.com/keycloak/keycloak/security/advisories/GHSA-8rmm-gm28-pj8q
nvd.nist.gov/vuln/detail/CVE-2023-6717
Related
6 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
LOW
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:L
6.8 Medium
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
10.4%