CVE-2020-1758: Red Hat Keycloak
Medium severity, CVSS 5.9. EPSS: 0.9% chance of exploitation in the next 30 days.
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.
Affected products
Published 2020-05-15. Last modified 2026-06-17.