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Fencer Intel
medium 5.6

CVE-2020-1744 json

Exposure of Sensitive Information in keycloak

published 6y ago modified 4mo ago also GHSA-4gf2-xv97-63m2 , EUVD-2021-1973

cvss
5.6
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits
0
none known

Summary

A flaw was found in keycloak before version 9.0.1. When configuring an Conditional OTP Authentication Flow as a post login flow of an IDP, the failure login events for OTP are not being sent to the brute force protection event queue. So BruteForceProtector does not handle this events.

Patch / fix

  • maven org.keycloak:keycloak-core 9.0.1
  • redhat keycloak 9.0.1
  • rh-sso7-keycloak red hat single sign on 7 4.8.18-1.Final_redhat_00001.1.el8sso
  • rh-sso7-keycloak-server red hat single sign on 7 4.8.18-1.Final_redhat_00001.1.el8sso
  • rh-sso7-keycloak red hat single sign on 7 4.8.18-1.Final_redhat_00001.1.el7sso
  • rh-sso7-keycloak-server red hat single sign on 7 4.8.18-1.Final_redhat_00001.1.el7sso
  • rh-sso7-keycloak red hat single sign on 7 4.8.18-1.Final_redhat_00001.1.el6sso
  • rh-sso7-keycloak-server red hat single sign on 7 4.8.18-1.Final_redhat_00001.1.el6sso

red hat advisories RHSA-2020:0947RHSA-2020:0946RHSA-2020:0945

  • ansible-14 openSUSE Tumbleweed 14.6.0-1.1
  • ansible-13 openSUSE Tumbleweed 13.7.0-1.1
  • ansible-12 openSUSE Tumbleweed 12.2.0-1.1
  • ansible-11 openSUSE Tumbleweed 11.11.0-1.1
  • ansible-10 openSUSE Tumbleweed 10.6.0-1.1
  • ansible-9 openSUSE Tumbleweed 9.8.0-1.1

opensuse advisories openSUSE-SU-2026:12447-1openSUSE-SU-2026:10944-1openSUSE-SU-2025:15753-1openSUSE-SU-2025:15605-1openSUSE-SU-2024:14536-1openSUSE-SU-2024:14244-1

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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-2020-1744 updated cvss 5.6

keycloak: failedLogin Event not sent to BruteForceProtector when using Post Login Flow with Conditional-OTP

  • Red Hat OpenShift Application Runtimes keycloak keycloak Red Hat support for Spring Boot keycloak keycloak
    affected: no fix available
  • Red Hat Runtimes Spring Boot 2.2.6
    fixed: vendor fix RHSA-2020:2252
  • Red Hat Single Sign-On 7.3
    fixed: vendor fix RHSA-2020:0951
  • Red Hat Single Sign-On 7.3 for RHEL 6 Server rh-sso7-keycloak 4.8.18-1.Final_redhat_00001.1.el6sso, rh-sso7-keycloak-server 4.8.18-1.Final_redhat_00001.1.el6sso
    fixed: vendor fix RHSA-2020:0945
  • Red Hat Single Sign-On 7.3 for RHEL 7 Server rh-sso7-keycloak 4.8.18-1.Final_redhat_00001.1.el7sso, rh-sso7-keycloak-server 4.8.18-1.Final_redhat_00001.1.el7sso
    fixed: vendor fix RHSA-2020:0946
  • Red Hat Single Sign-On 7.3 for RHEL 8 rh-sso7-keycloak 4.8.18-1.Final_redhat_00001.1.el8sso, rh-sso7-keycloak-server 4.8.18-1.Final_redhat_00001.1.el8sso
    fixed: vendor fix RHSA-2020:0947
  • Red Hat Text-Only RHOAR
    fixed: vendor fix RHSA-2020:2905
  • 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

1.12% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 5.6 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
NVD 3.1 5.6 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P
GitHub 3.1 5.6 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

Affected packages

ecosystem package affected fixed in
maven org.keycloak:keycloak-core
<9.0.1
9.0.1

Affected products

  • Red Hat keycloak

Classification

Weakness
  • CWE-755 Improper Handling of Exceptional Conditions
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

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.