A massive supply chain attack targeting the Arch User Repository (AUR) has compromised more than 400 community-maintained packages, with attackers injecting malicious build scripts designed to deploy credential-stealing malware and rootkit-style payloads on affected Linux systems.
the problem is exactly the fact that it is a repo; it introduces a layer of unknown between the dev and the user. and the user will unavoidably “trust” it (especially when it’s listed amongst official repos in e.g. the graphical version of Pamac), without understanding the risks.