Interesting, this definitely happened with a more recent version... Wonder if theres some other exploit at play too (could also be the containerized version?)

I had an issue where I used the redis docker image and didn't understand docker networking properly so I set the network mode as host so my other container could connect. Not knowing this had exposed redis to the world unauthenticated (in about 2018).

Eventually a kind script set a password on redis which caused me to notice and fix this issue.