Luanti 5 before 5.15.2 sometimes allows unintended access to an insecure environment. If at least one mod is listed as secure.trusted_mods or secure.http_mods, then a crafted mod can intercept the request for the insecure environment or HTTP API, and also receive access to it.
Exploitability
AV:LAC:HPR:NUI:NScope
S:CImpact
C:HI:HA:H8.1/CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:HOther