Jenkins 2.227 and earlier, LTS 2.204.5 and earlier uses different representations of request URL paths, which allows attackers to craft URLs that allow bypassing CSRF protection of any target URL.
Jenkins 2.213 and earlier, LTS 2.204.1 and earlier improperly reuses encryption key parameters in the Inbound TCP Agent Protocol/3, allowing unauthorized attackers with knowledge of agent names to obtain the connection secrets for those agents, which can be used to connect to Jenkins, impersonating those agents.
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.
A stored cross-site scripting vulnerability in Jenkins 2.191 and earlier, LTS 2.176.2 and earlier allowed attackers with Overall/Administer permission to configure the update site URL to inject arbitrary HTML and JavaScript in update center web pages.
Jenkins 2.191 and earlier, LTS 2.176.2 and earlier allowed users to obtain CSRF tokens without an associated web session ID, resulting in CSRF tokens that did not expire and could be used to bypass CSRF protection for the anonymous user.