CVE-2018-1999045: Jenkins

Medium severity, CVSS 5.4. EPSS: 0.9% chance of exploitation in the next 30 days.

A improper authentication vulnerability exists in Jenkins 2.137 and earlier, 2.121.2 and earlier in SecurityRealm.java, TokenBasedRememberMeServices2.java that allows attackers with a valid cookie to remain logged in even if that feature is disabled.

Affected products

• Jenkins Jenkins: up to and including 2.121.2; up to and including 2.137

Published 2018-08-23. Last modified 2026-06-17.