Description
A flaw was found in Keycloak in versions before 10.0.0, where it does not perform the TLS hostname verification while sending emails using the SMTP server. This flaw allows an attacker to perform a man-in-the-middle (MITM) attack.
Remediation
References
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1758
https://issues.redhat.com/browse/KEYCLOAK-13285
Related Vulnerabilities
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CVE-2021-39231 Vulnerability in maven package org.apache.ozone:ozone-main
CVE-2019-14837 Vulnerability in maven package org.keycloak:keycloak-services