It is strongly suggested that you update your Jenkins website to the latest version.
You can find more info about these issue at this Jenkins Security Advisory.
We have released Bitnami Jenkins 1.638 installers, virtual machines and Amazon EC2, Google, VMware vCloud Air, DigitalOcean, Oracle and Azure cloud images that fix these issues.
Have questions about Bitnami Jenkins or the security issue? Post to our community forum, and we would be happy to help you.