Kibana has released versions 4.5.4 and 4.1.11, addressing two significant security vulnerabilities, enhancing tile map zoom capabilities, and fixing several bugs to improve user experience. The security updates include resolving an XSS vulnerability in markdown visualizations and ensuring Kibana logging does not store cookies or authorization headers, thereby preventing potential session hijacking. Other improvements include increasing the maximum zoom for tile maps, resolving issues with the search box autocomplete in Google Chrome, and fixing errors related to quick clicks, disappearing labels in split charts, and permission errors during package manager upgrades. Users are encouraged to upgrade to these versions to benefit from enhanced security and functionality.