The WordPress project has just released a new version due to a security release. WordPress versions 4.2.2 and earlier are affected by a cross-site scripting vulnerability, which could allow users with the Contributor or Author role to compromise a site. They also fixed an issue that allowed the possibility for a user with Subscriber permissions to create a draft through Quick Draft.
The WordPress team strongly encourages their users to update their site to this version. For more details please check the official announcement. If you already have a running version of Bitnami WordPress, the application will automatically be updated. You can confirm that the update has been done by checking the version from your admin panel.