As an user of the AUR, this is devastating news to me. I am also guilty of accepting updates without reading the latest changes, even if yay asks me if I want to. This is a reminder to everyone to only install from the AUR for absolutely necessary stuff only, and only if you trust the maintainer. And to at least have a look if something suspicious is going in with the recent changes in the package recipe. AND to read in the communities and news.
I don't understand why there still no official announcement as a warning from the Archlinux team at https://archlinux.org/news/ . Is there a different place for security news specifically about the AUR to subscribe to?