Thank you for asking this question and bringing attention to the matter on our community forum!
RStudio has confirmed that CVE-2021-44228 (Log4j vulnerability) is not present in the currently supported versions of RStudio Professional software applications. For a list of our currently supported versions of RStudio Professional software applications, please see RStudio Support - RStudio.
Hope this helps ease any concerns you may have!
-Kyle
ShinyProxy is a product from Open Analytics and is in no way affiliated with RStudio. In regards to shinycannon, that is used as part of shinyloadtest for load testing Shiny apps. Both shinycannon and shinytest are completely separate from Shiny Server and RStudio Connect. For those that do use shinycannon as part of their load testing, we do have a fix for the Log4j vulnerability in progress right now.
Advice/Concern:
Kyle, I do think its important because this is an open source community to keep people up to date on at least which packages have been patched realted to shiny. For example shinytableau is not patched. Its probably not going to be patched as the issue is on the Tableau end. Exploits are not something to mess around with. Its everyone collective responsiblity. Not just Open Analytics or Rstudios
Concern:
People might not be aware that they should still update there shiny related packages.
Praise:
On the other hand, I do want to praise R for being on top of things with patching the issue. So thank you for your honesty.
All supported versions of RStudio IDE (open source and pro), RSTudio Server (open source), and RStudio Workbench (Pro) do not use Log4J, and are not impacted by this vulnerability.