This is a companion discussion topic for the original entry at https://www.rstudio.com/blog/shiny-server-1-5-16-update
Important Security Notice A vulnerability was discovered in Shiny Server that could allow the download of published application source code directly from the server. This issue affects both Shiny Server Pro and the open source Shiny Server product.
We recommend upgrading to the new version immediately. If this is not possible, please contact support@rstudio.com who will supply an interim fix that can be applied to the configuration.
Release Notes In addition to the important security patch described above, the following items have been addressed in this release: