CVSS 3.1
5.9 mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:NCVE-2020-1758
Medium (5.9) in redhat. EPSS 0.9% chance of exploitation in the next 30 days. Fixed in org.keycloak:keycloak-parent 10.0.0.
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.
Severity
- EPSS
- 0.9% chance of exploitation in the next 30 days; higher than 60% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-295, CWE-297
- Published
- Modified
- Record from
- the NVD, synced
Affected
- redhat:keycloak
- redhat:openstack
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-c597-f74m-jgc2 | Maven | org.keycloak:keycloak-parent | <10.0.0 | 10.0.0 |