A Host Header Injection issue on the Login page of Plesk Obsidian through 18.0.49 allows attackers to redirect users to malicious websites via a Host request header. NOTE: the vendor's position is "the ability to use arbitrary domain names to access the panel is an intended feature."
https://support.plesk.com/hc/en-us/articles/10254625170322-Vulnerability-CVE-2023-24044
https://medium.com/%40jetnipat.tho/cve-2023-24044-10e48ab940d8
https://gist.github.com/TJetnipat/02b3854543b7ec95d54a8de811f2e8ae