Jenkins before 1.586 does not set the secure flag on session cookies when run on Tomcat 7.0.41 or later, which makes it easier for remote attackers to capture cookies by intercepting their transmission within an HTTP session.

The re-key admin monitor was introduced in Jenkins 1.498 and re-encrypted all secrets in JENKINS_HOME with a new key. It also created a backup directory with all old secrets, and the key used to encrypt them. These backups were world-readable and not removed afterwards. Jenkins now deletes the backup directory, if present. Upgrading from before 1.498 will no longer create a backup directory. Administrators relying on file access permissions in their manually created backups are advised to check them for the directory $JENKINS_HOME/jenkins.security.RekeySecretAdminMonitor/backups, and delete it if present.

Jenkins Gogs Plugin 1.0.15 and earlier uses a non-constant time comparison function when checking whether the provided and expected webhook token are equal, potentially allowing attackers to use statistical methods to obtain a valid webhook token.

Jenkins Multibranch Scan Webhook Trigger Plugin 1.0.9 and earlier uses a non-constant time comparison function when checking whether the provided and expected webhook token are equal, potentially allowing attackers to use statistical methods to obtain a valid webhook token.

Jenkins MSTeams Webhook Trigger Plugin 0.1.1 and earlier uses a non-constant time comparison function when checking whether the provided and expected webhook token are equal, potentially allowing attackers to use statistical methods to obtain a valid webhook token.

Jenkins Zanata Plugin 0.6 and earlier uses a non-constant time comparison function when checking whether the provided and expected webhook token hashes are equal, potentially allowing attackers to use statistical methods to obtain a valid webhook token.

Jenkins LDAP Email Plugin transmits configured credentials in plain text as part of the global Jenkins configuration form, potentially resulting in their exposure.

The loadUserByUsername function in hudson/security/HudsonPrivateSecurityRealm.java in Jenkins before 1.551 and LTS before 1.532.2 allows remote attackers to determine whether a user exists via vectors related to failed login attempts.

Jenkins Support Core Plugin 2.72 and earlier provides the serialized user authentication as part of the "About user (basic authentication details only)" information, which can include the session ID of the user creating the support bundle in some configurations.

The input control in PasswordParameterDefinition in Jenkins before 1.551 and LTS before 1.532.2 allows remote attackers to obtain passwords by reading the HTML source code, related to the default value.

The agent-to-controller security check FilePath#reading(FileVisitor) in Jenkins 2.318 and earlier, LTS 2.303.2 and earlier does not reject any operations, allowing users to have unrestricted read access using certain operations (creating archives, FilePath#copyRecursiveTo).

Jenkins Subversion Plugin 2.15.0 and earlier does not restrict the name of a file when looking up a subversion key file on the controller from an agent.

Jenkins 2.274 and earlier, LTS 2.263.1 and earlier does not correctly match requested URLs to the list of always accessible paths, allowing attackers without Overall/Read permission to access some URLs as if they did have Overall/Read permission.

Jenkins before 1.583 and LTS before 1.565.3 allows remote attackers to enumerate user names via vectors related to login attempts.

Jenkins Pipeline Maven Integration Plugin 1330.v18e473854496 and earlier does not properly mask (i.e., replace with asterisks) usernames of credentials specified in custom Maven settings in Pipeline build logs if "Treat username as secret" is checked.

A vulnerability exists in Jenkins 2.137 and earlier, 2.121.2 and earlier in XStream2.java that allows attackers to have Jenkins resolve a domain name when deserializing an instance of java.net.URL.

Jenkins S3 Explorer Plugin 1.0.8 and earlier does not mask the AWS_SECRET_ACCESS_KEY form field, increasing the potential for attackers to observe and capture it.

Jenkins Statistics Gatherer Plugin 2.0.3 and earlier does not mask the AWS Secret Key on the global configuration form, increasing the potential for attackers to observe and capture it.

Jenkins 360 FireLine Plugin 1.7.2 and earlier programmatically disables Content-Security-Policy protection for user-generated content in workspaces, archived artifacts, etc. that Jenkins offers for download.

The webhook endpoint in Jenkins Gogs Plugin 1.0.15 and earlier provides unauthenticated attackers information about the existence of jobs in its output.

Jenkins Chef Identity Plugin 2.0.3 and earlier does not mask the user.pem key form field, increasing the potential for attackers to observe and capture it.

The Fingerprints pages in Jenkins before 1.638 and LTS before 1.625.2 might allow remote attackers to obtain sensitive job and build name information via a direct request.

Jenkins SCTMExecutor Plugin 2.2 and earlier transmits previously configured service credentials in plain text as part of the global configuration, as well as individual jobs' configurations.

Jenkins Ansible Plugin 204.v8191fd551eb_f and earlier does not mask extra variables displayed on the configuration form, increasing the potential for attackers to observe and capture them.

A missing permission check in Jenkins Quay.io trigger Plugin 0.1 and earlier allows unauthenticated attackers to trigger builds of jobs corresponding to the attacker-specified repository.

Jenkins Aqua Security Scanner Plugin 3.0.17 and earlier transmitted configured credentials in plain text as part of the global Jenkins configuration form, potentially resulting in their exposure.

Jenkins Aqua MicroScanner Plugin 1.0.7 and earlier transmitted configured credentials in plain text as part of the global Jenkins configuration form, potentially resulting in their exposure.

Jenkins Inedo BuildMaster Plugin 2.4.0 and earlier transmitted configured credentials in plain text as part of the global Jenkins configuration form, potentially resulting in their exposure.

A session fixation vulnerability in Jenkins Gitlab Authentication Plugin 1.4 and earlier in GitLabSecurityRealm.java allows unauthorized attackers to impersonate another user if they can control the pre-authentication session.

Jenkins SourceGear Vault Plugin transmits configured credentials in plain text as part of job configuration forms, potentially resulting in their exposure.

Jenkins Inedo ProGet Plugin 1.2 and earlier transmitted configured credentials in plain text as part of the global Jenkins configuration form, potentially resulting in their exposure.

A arbitrary file read vulnerability exists in Jenkins 2.132 and earlier, 2.121.1 and earlier in the Stapler web framework's org/kohsuke/stapler/Stapler.java that allows attackers to send crafted HTTP requests returning the contents of any file on the Jenkins master file system that the Jenkins master has access to.

An improper authorization vulnerability exists in Jenkins Subversion Plugin version 2.10.2 and earlier in SubversionStatus.java and SubversionRepositoryStatus.java that allows an attacker with network access to obtain a list of nodes and users.

An exposure of sensitive information vulnerability exists in Jenkins Perforce Plugin version 1.3.36 and older in PerforcePasswordEncryptor.java that allows attackers with local file system access to obtain encrypted Perforce passwords and decrypt them.

An improper input validation vulnerability exists in Jenkins versions 2.106 and earlier, and LTS 2.89.3 and earlier, that allows an attacker to access plugin resource files in the META-INF and WEB-INF directories that should not be accessible, if the Jenkins home directory is on a case-insensitive file system.

An exposure of sensitive information vulnerability exists in Jenkins 2.115 and older, LTS 2.107.1 and older, in CLICommand.java and ViewOptionHandler.java that allows unauthorized attackers to confirm the existence of agents or views with an attacker-specified name by sending a CLI command to Jenkins.

An improper authorization vulnerability exists in Jenkins Mercurial Plugin version 2.2 and earlier in MercurialStatus.java that allows an attacker with network access to obtain a list of nodes and users.

Jenkins project Jenkins AWS CodeDeploy Plugin version 1.19 and earlier contains a File and Directory Information Exposure vulnerability in AWSCodeDeployPublisher.java that can result in Disclosure of environment variables. This vulnerability appears to have been fixed in 1.20 and later.

An improper authorization vulnerability exists in Jenkins Git Plugin version 3.7.0 and earlier in GitStatus.java that allows an attacker with network access to obtain a list of nodes and users.

jenkins-email-ext before version 2.57.1 is vulnerable to an Information Exposure. The Email Extension Plugins is able to send emails to a dynamically created list of users based on the changelogs, like authors of SCM changes since the last successful build. This could in some cases result in emails being sent to people who have no user account in Jenkins, and in rare cases even people who were not involved in whatever project was being built, due to some mapping based on the local-part of email addresses.