Nextcloud also ships a CLI utility called nextcloudcmd which is sometimes used for automated scripting and headless servers. Versions of nextcloudcmd prior to 3.6.1 would incorrectly trust invalid TLS certificates, which may enable a Man-in-the-middle attack that exposes sensitive data or credentials to a network attacker. This affects the CLI only. It does not affect the standard GUI desktop Nextcloud clients, and it does not affect the Nextcloud server.
Exploitability
AV:LAC:LPR:LUI:RScope
S:UImpact
C:LI:LA:N3.9/CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:NCryptography