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Enterprise role·Only what they are added to
Guest collaborator
Tier 3 · LowData
Why Tier 3
None of its abilities map to a permission on the reference, so it gets the lowest tier.
A managed user with limited access by default (Enterprise Managed Users only).
Context-dependent: what the role is attached to (the repositories, the team's access, organization policy) decides the real tier.
Available on: EMU. Source
Attack paths
No attack technique, escalation or incident on ghtier goes through this yet.