Multifactor authentication is a cornerstone of account security, but it has a blind spot: OAuth consent abuse. Attackers can trick users into granting permissions to malicious applications, and MFA does nothing to flag that the consent itself is harmful. The source emphasizes that MFA is essential, yet it cannot replace the need for OAuth governance.
To defend against this threat, organizations must enforce least-privilege scopes, so apps only receive the minimum access required. They should also monitor consent activity for anomalies and be prepared to revoke grants quickly when abuse is suspected. The source stresses that these measures—not MFA alone—are what actually mitigate OAuth consent abuse.
In short, treat MFA as one layer, not a silver bullet. Pair it with strict OAuth policies and active oversight to close the gap that attackers exploit.