OAuth Permissions in Microsoft Entra ID Enable Stealthy Corporate Email Access

OAuth Permissions in Microsoft Entra ID Enable Stealthy Corporate Email Access

Why This Matters Now Recent high-profile data breaches have highlighted the critical importance of properly configuring OAuth permissions in Microsoft Entra ID. Attackers are increasingly exploiting misconfigured OAuth clients to gain unauthorized access to corporate email and other sensitive resources. The recent Petri IT Knowledgebase article underscores the urgency of addressing this issue, as improperly scoped permissions can provide attackers with stealthy access to corporate data. 🚨 Security Alert: Misconfigured OAuth permissions can lead to unauthorized access to corporate email, putting sensitive data at risk. 100+Breaches Reported 2023Year of Reports Understanding OAuth Permissions in Microsoft Entra ID OAuth permissions in Microsoft Entra ID allow applications to request specific levels of access to resources within an organization’s Azure Active Directory. These permissions are categorized into two types: ...

Feb 28, 2026 · 5 min · 932 words · IAMDevBox