CVE-2020-1744: A flaw was found in keycloak before version 9.0.1

Q: How do I fix CVE-2020-1744?

keycloak: upgrade to 9.0.1. Exact commands for each OS are on this page.

Q: Is CVE-2020-1744 being exploited?

CVE-2020-1744 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-1744 affect?

CVE-2020-1744 affects keycloak. Severity is medium (CVSS 5.6). 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 Bru

Q: How urgent is CVE-2020-1744?

Priority 46/100. Remotely exploitable, no login, no user action; On your watchlist

This month

MEDIUM 5.6REMOTEWATCHLISTUPGRADE

CVE-2020-1744 is a medium-severity flaw (CVSS 5.6) affecting keycloak. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	5.6 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	1.1% (top 34%)
CISA exploited list	No
Weakness	CWE-755
Published	2020-03-24
Last modified	2026-06-17

Publisher (CNA): Red Hat, Inc. · Vendor: redhat

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-03-24 14:15 UTCPublished CVE record published
2026-06-17 03:02 UTCUpdated Record last modified

redhat keycloak UPGRADE

Affected: < 9.0.1

Fixed in: 9.0.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy keycloak || rpm -q keycloak || keycloak --version

2. UPGRADE to 9.0.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade keycloak

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade keycloak

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-1744?

keycloak: upgrade to 9.0.1. Exact commands for each OS are on this page.

Is CVE-2020-1744 being exploited?

CVE-2020-1744 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-1744 affect?

CVE-2020-1744 affects keycloak. Severity is medium (CVSS 5.6). 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 Bru

How urgent is CVE-2020-1744?

Priority 46/100. Remotely exploitable, no login, no user action; On your watchlist

Software pages

Keycloak vulnerabilities

Related CVEs

CVE-2023-6927 MEDIUM 4.6 MITIGATE DOWNGRADE A flaw was found in Keycloak
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CVE-2023-6134 MEDIUM 4.6 UPGRADE UPGRADE A flaw was found in Keycloak that prevents certain schemes in redirects, but permits them if a wildcard is app
CVE-2025-8419 MEDIUM 5.3 MITIGATE A vulnerability was found in Keycloak-services

References

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