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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.010 (62.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 62.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000
Affected products
- Keycloak
- Red Hat, Inc. Keycloak — versions 3.4.0
- Red Hat Enterprise Linux Server — versions 6.0, 7.0
- Red Hat Single Sign On — versions 7.0, 7.1
Weakness classification (CWE)
References
- access.redhat.com/errata/RHSA-2017:2904 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:2905 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:2906 (vendor-advisory, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Issue Tracking)
- www.securityfocus.com/bid/101618 (VDB Entry, Third Party Advisory, vdb-entry)
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.