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.

The remoting module in Jenkins before 2.32 and LTS before 2.19.3 allows remote attackers to execute arbitrary code via a crafted serialized Java object, which triggers an LDAP query to a third-party server.

The API URL computer/(master)/api/xml in Jenkins before 2.3 and LTS before 1.651.2 allows remote authenticated users with extended read permission for the master node to obtain sensitive information about the global configuration via unspecified vectors.

Multiple open redirect vulnerabilities in Jenkins before 2.3 and LTS before 1.651.2 allow remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via unspecified vectors related to "scheme-relative" URLs.

Jenkins before 2.3 and LTS before 1.651.2 allows remote authenticated users to trigger updating of update site metadata by leveraging a missing permissions check. NOTE: this issue can be combined with DNS cache poisoning to cause a denial of service (service disruption).

Jenkins before 2.3 and LTS before 1.651.2 allow remote authenticated users with extended read access to obtain sensitive password information by reading a job configuration.

Jenkins before 2.3 and LTS before 1.651.2 allow remote authenticated users with read access to obtain sensitive plugin installation information by leveraging missing permissions checks in unspecified XML/JSON API endpoints.

Jenkins before 2.3 and LTS before 1.651.2 allow remote authenticated users with multiple accounts to cause a denial of service (unable to login) by editing the "full name."

Jenkins before 2.3 and LTS before 1.651.2 might allow remote authenticated users to inject arbitrary build parameters into the build environment via environment variables.

Multiple unspecified API endpoints in Jenkins before 1.650 and LTS before 1.642.2 allow remote authenticated users to execute arbitrary code via serialized data in an XML file, related to XStream and groovy.util.Expando.

Jenkins before 1.650 and LTS before 1.642.2 do not use a constant-time algorithm to verify CSRF tokens, which makes it easier for remote attackers to bypass a CSRF protection mechanism via a brute-force approach.

Jenkins before 1.650 and LTS before 1.642.2 do not use a constant-time algorithm to verify API tokens, which makes it easier for remote attackers to determine API tokens via a brute-force approach.

CRLF injection vulnerability in the CLI command documentation in Jenkins before 1.650 and LTS before 1.642.2 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via unspecified vectors.

The remoting module in Jenkins before 1.650 and LTS before 1.642.2 allows remote attackers to execute arbitrary code by opening a JRMP listener.

The Plugins Manager in Jenkins before 1.640 and LTS before 1.625.2 does not verify checksums for plugin files referenced in update site data, which makes it easier for man-in-the-middle attackers to execute arbitrary code via a crafted plugin.

Jenkins before 1.640 and LTS before 1.625.2 allow remote attackers to bypass the CSRF protection mechanism via unspecified vectors.

Cross-site request forgery (CSRF) vulnerability in Jenkins before 1.640 and LTS before 1.625.2 allows remote attackers to hijack the authentication of administrators for requests that have unspecified impact via vectors related to the HTTP GET method.

Cross-site scripting (XSS) vulnerability in Jenkins before 1.640 and LTS before 1.625.2 allows remote authenticated users to inject arbitrary web script or HTML via unspecified vectors related to workspaces and archived artifacts.

The Jenkins CLI subsystem in Jenkins before 1.638 and LTS before 1.625.2 allows remote attackers to execute arbitrary code via a crafted serialized Java object, related to a problematic webapps/ROOT/WEB-INF/lib/commons-collections-*.jar file and the "Groovy variant in 'ysoserial'".