CVE-2020-1744: Exposure of Sensitive Information in keycloak
Summary
CVE-2020-1744: Exposure of Sensitive Information in keycloak. Affects org.keycloak:keycloak-core versions < 9.0.1. Fixed in 9.0.1. How to fix ↓
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Background
Keycloak is an open-source identity and access management solution that allows organizations to secure their applications and services. It provides features such as single sign-on, social login, and multi-factor authentication. The keycloak-core package is a core component of Keycloak, responsible for handling authentication and authorization processes. This vulnerability affects versions prior to 9.0.1 of the keycloak-core package.
Vulnerability Detail
The vulnerability identified as CVE-2020-1744 in keycloak-core allows for the exposure of sensitive information. Specifically, when configuring a Conditional OTP Authentication Flow as a post-login flow of an Identity Provider (IDP), the failure login events for OTP are not being sent to the brute force protection event queue. As a result, the BruteForceProtector component does not handle these events, leaving the system vulnerable to brute force attacks. This vulnerability has a CVSS score of 5.6, indicating a moderate severity level.
How To Fix
Latest published version: 26.8.1 as of 22 Oct 2026
Upgrading to it may include breaking changes; the version below is the minimum fixed release for this vulnerability.
If you need the minimum change
9.0.1
This is the first release that contains the fix.
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Workaround
As a workaround, users can manually implement a custom solution to handle the failure login events for OTP and integrate it with the BruteForceProtector component. However, it is strongly advised to apply the official fix by upgrading to the latest version of the keycloak-core package.
Conclusion
In conclusion, the CVE-2020-1744 vulnerability in the keycloak-core package exposes sensitive information and leaves the system vulnerable to brute force attacks. It is crucial to upgrade to version 9.0.1 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
Keycloak is an open-source identity and access management solution that provides features such as single sign-on, social login, and multi-factor authentication.
The keycloak-core package is a core component of Keycloak responsible for handling authentication and authorization processes.
This vulnerability exposes sensitive information and leaves the system vulnerable to brute force attacks.
The CVSS score of this vulnerability is 5.6, indicating a moderate severity level.
To fix this vulnerability, it is recommended to upgrade the keycloak-core package to version 9.0.1 or later.
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