Jenkins 2.218 and earlier, LTS 2.204.1 and earlier did not use a constant-time comparison function for validating connection secrets, which could potentially allow an attacker to use a timing attack to obtain this secret.

Jenkins 2.218 and earlier, LTS 2.204.1 and earlier allowed users with Overall/Read access to view a JVM memory usage chart.

Jenkins 2.218 and earlier, LTS 2.204.1 and earlier used a non-constant time comparison function when validating an HMAC.

Jenkins 2.218 and earlier, LTS 2.204.1 and earlier was vulnerable to a UDP amplification reflection denial of service attack on port 33848.

Jenkins 2.218 and earlier, LTS 2.204.1 and earlier exposed session identifiers on a user's detail object in the whoAmI diagnostic page.

REST API endpoints in Jenkins 2.218 and earlier, LTS 2.204.1 and earlier were vulnerable to clickjacking attacks.

Jenkins QMetry for JIRA - Test Management Plugin 1.12 and earlier stores credentials unencrypted in job config.xml files on the Jenkins master where they can be viewed by users with Extended Read permission, or access to the master file system.

Jenkins QMetry for JIRA - Test Management Plugin transmits credentials in its configuration in plain text as part of job configuration forms, potentially resulting in their exposure.

Cross-site Scripting (XSS) in Jenkins main before 1.482 and LTS before 1.466.2 allows remote attackers to inject arbitrary web script or HTML in the Violations plugin.

Cross-site Scripting (XSS) in Jenkins main before 1.482 and LTS before 1.466.2 allows remote attackers to inject arbitrary web script or HTML in the CI game plugin.