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Fencer Intel
medium 4.8

CVE-2020-1728 json

Improper Restriction of Rendered UI Layers or Frames in Keycloak

published 6y ago modified 4mo ago also GHSA-3gg7-9q2x-79fc , EUVD-2020-0360

cvss
4.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 56%
public exploits
0
none known

Summary

A vulnerability was found in all versions of Keycloak where, the pages on the Admin Console area of the application are completely missing general HTTP security headers in HTTP-responses. This does not directly lead to a security issue, yet it might aid attackers in their efforts to exploit other problems. The flaws unnecessarily make the servers more prone to Clickjacking, channel downgrade attacks and other similar client-based attack vectors.

Patch / fix

  • redhat keycloak 10.0.0
  • rh-sso7-keycloak red hat single sign on 7 9.0.5-1.redhat_00001.1.el8sso
  • rh-sso7-keycloak-server red hat single sign on 7 9.0.5-1.redhat_00001.1.el8sso
  • rh-sso7-keycloak red hat single sign on 7 9.0.5-1.redhat_00001.1.el7sso
  • rh-sso7-keycloak-server red hat single sign on 7 9.0.5-1.redhat_00001.1.el7sso
  • rh-sso7-keycloak red hat single sign on 7 9.0.5-1.redhat_00001.1.el6sso
  • rh-sso7-keycloak-server red hat single sign on 7 9.0.5-1.redhat_00001.1.el6sso

red hat advisories RHSA-2020:3497RHSA-2020:3496RHSA-2020:3495

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-1728 updated cvss 4.8

keycloak: security headers missing on REST endpoints

  • Red Hat build of Quarkus keycloak keycloak
    affected: no fix available
  • Red Hat OpenShift Application Runtimes keycloak keycloak
    affected: no fix planned “Out of support scope”
  • Red Hat support for Spring Boot keycloak keycloak
    affected: no fix available
  • Red Hat build of Quarkus 1.7.5
    fixed: vendor fix RHSA-2020:4252
  • Red Hat Runtimes Spring Boot 2.2.10
    fixed: vendor fix RHSA-2020:4213
  • Red Hat Single Sign-On 7.4 for RHEL 6 Server rh-sso7-keycloak 9.0.5-1.redhat_00001.1.el6sso, rh-sso7-keycloak-server 9.0.5-1.redhat_00001.1.el6sso
    fixed: vendor fix RHSA-2020:3495
  • Red Hat Single Sign-On 7.4 for RHEL 7 Server rh-sso7-keycloak 9.0.5-1.redhat_00001.1.el7sso, rh-sso7-keycloak-server 9.0.5-1.redhat_00001.1.el7sso
    fixed: vendor fix RHSA-2020:3496
  • Red Hat Single Sign-On 7.4 for RHEL 8 rh-sso7-keycloak 9.0.5-1.redhat_00001.1.el8sso, rh-sso7-keycloak-server 9.0.5-1.redhat_00001.1.el8sso
    fixed: vendor fix RHSA-2020:3497
show 3 more
  • Red Hat Single Sign-On 7.4.2
    fixed: vendor fix RHSA-2020:3501
  • Red Hat Text-Only RHOAR
    fixed: vendor fix RHSA-2020:3539
  • Red Hat Fuse 7 keycloak keycloak
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.78% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 4.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
NVD 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
NVD 2.0 5.8 AV:N/AC:M/Au:N/C:P/I:P/A:N

Affected packages

ecosystem package affected fixed in
maven org.keycloak:keycloak-core
<=9.0.3
 no fix listed

Affected products

  • [UNKNOWN] keycloak

Classification

Weakness
  • CWE-358 Improperly Implemented Security Check for Standard
  • CWE-1021 Improper Restriction of Rendered UI Layers or Frames

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.