Until explicitly accessed by script, window.globalThis is not enumerable and, as a result, is not visible to code such as Object.getOwnPropertyNames(window). Sites that deploy a sandboxing that depends on enumerating and freezing access to the window object may miss this, allowing their sandboxes to be bypassed. This vulnerability affects Firefox < 68.
6868Exploitability
AV:NAC:LPR:NUI:NScope
S:CImpact
C:LI:LA:L8.3/CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L