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)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.012 (66.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 66.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000
Affected products
- Red Hat Keycloak — versions 3.4.3.Final, 4.0.0.Beta2, 4.3.0.Final
- Red Hat Keycloak — versions 3.4.3, 4.0.0, 4.3.0
- Red Hat Linux — versions 7.0, 6.0
- Red Hat Single Sign-On — versions 7.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.redhat.com/show_bug.cgi (Issue Tracking, Vendor Advisory)
- access.redhat.com/errata/RHSA-2018:3592 (vendor-advisory, Vendor Advisory)
- access.redhat.com/errata/RHSA-2018:3593 (vendor-advisory, Vendor Advisory)
- access.redhat.com/errata/RHSA-2018:3595 (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.