I find it concerning that access to the dev tier made it possible to escalate into production. Should dev not be sandboxed from production? "The intrusion or

I find it concerning that access to the dev tier made it possible to escalate into production. Should dev not be sandboxed from production? "The intrusion originated on May 5 when a build deployed to the development tier for stackoverflow.com contained a bug, which allowed an attacker to log in to our development tier as well as escalate their access on the production version of stackoverflow.com. "