XSS in Red Hat Keycloak
CVE-2018-14655
A flaw was found in Keycloak 3.4.3.Final, 4.0.0.Beta2, 4.3.0.Final. When using 'response_mode=form_post' it is possible to inject arbitrary Javascript-Code via the 'state'-parameter in the authentication URL. This allows an XSS-Attack upon succesfully login.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.012 (64.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.6 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N.
Affected products
- Red Hat Keycloak — versions 3.4.3.Final, 4.0.0.Beta2, 4.3.0.Final
- Redhat Keycloak — versions 3.4.3, 4.0.0, 4.3.0
- Redhat Linux — versions 7.0, 6.0
- Redhat Single_sign-on — versions 7.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (x_refsource_CONFIRM, Issue Tracking, Vendor Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Vendor Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Vendor Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2018-14655?
- CVE-2018-14655 is a medium-severity vulnerability in Red Hat Keycloak, classified under Cross-site Scripting. CVSS score: 4.6/10. Published 2018-11-13.
- How severe is CVE-2018-14655?
- Medium severity. CVSS v3 base score is 4.6 out of 10.
- Is CVE-2018-14655 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.