Kacho
Member
Call of Duty: WWII was only added to Game Pass and the Microsoft Store in June, and therein may lie the issue. TechCrunch reports that different versions of the game were added to Microsoft's store and subscription, including "an old flaw that had been patched on other versions of the game." At the time of writing, the game has not yet been restored.

Activision pulls Call of Duty game after PC players are hacked
Call of Duty: Remote Code Execution
