An information leak was discovered in OpenStack heat. This issue could allow a remote, authenticated attacker to use the 'stack show' command to reveal parameters which are supposed to remain hidden. This has a low impact to the confidentiality, integrity, and availability of the system.
https://launchpad.net/bugs/1999665
https://github.com/openstack/heat/commit/a49526c278e52823080c7f3fcb72785b93fd4dcb