XSS in Keycloak
CVE-2017-12158
It was found that Keycloak would accept a HOST header URL in the admin console and use it to determine web resource locations. An attacker could use this flaw against an authenticated user to attain reflected XSS via a malicious server.
Vulnerability class: HTTP Request Smuggling
EPSS: 0.010 (59.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
Affected products
- Keycloak
- Red Hat, Inc. Keycloak — versions 3.4.0
- Redhat Enterprise_linux_server — versions 6.0, 7.0
- Redhat Single_sign_on — versions 7.0, 7.1
Weakness classification (CWE)
References
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (x_refsource_CONFIRM, Issue Tracking)
- secalert@redhat.com (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
Frequently asked questions
- What is CVE-2017-12158?
- CVE-2017-12158 is a medium-severity vulnerability in Keycloak, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 5.4/10. Published 2017-10-26.
- How severe is CVE-2017-12158?
- Medium severity. CVSS v3 base score is 5.4 out of 10.