I have no idea about the stance of CachyOS on AUR packages.

I totally agree with you, establishing trust is not an easy problem. I don’t expect the average joe to understand shell scripts. I would put myself in that categorie as well. This one however was simple enough that it seemed okay to me. If I don’t understand what’s going on in a script I am really careful and try to avoid it, if possible. I still wouldn’t consider them universally bad. For some things it is even the recommended install option. I vaguely remember some things in the Raspberry Pi universe ( IIRC this was even the case for Docker in the past).

There are multiple factors which can lead to trust. Maybe you know the CachyOS forum and how well it is maintained. How old is the account etc… But as you said, there are always risks. The account could be compromized as well. But most of that isn’t specific to shell scripts or Linux in general. You shouldn’t install an application from some shady website in Windows either.

What is your recommended way to deal with the current situation?

I don’t use CachyOS nor do I know anything about their team and I haven’t used the script either. My point was just that I would trust OS maintainers more than some random guy on the internet.

I have checked again and it seems the script I was referring to was actually from a mod on their community forum. Not sure if this is a maintainer as well or not.

My point still stands, if you trust the source and checked the code that nothing shady is going on, it is perfectly fine to run a script. Even if it is just an additional check after you cleaned it manually. Maybe you have missed something.

I haven’t checked the scripts from OP, but i think there is a script that is provided by the CachyOS team that basically just contains a list of compromised packages and compares that to your pacman -Qm output. If it finds a match, it tells you that the compromized package X is on your system. That seems pretty reasonable.

I get your point and as always, you should check the source of the script as well as the code inside of it. Never installing anything outside of official OS repositories is probably not an option for most people. There are always pros and cons. Like in my example maybe some OS maintainers know more about the affected packages than I do with a quick search. On the other hand, the script might be outdated because the number of packages changed a lot over the last few days.