Security · 2h ago
Securing Entra extension points: Function Apps as trust boundaries
Microsoft Entra extension points hand trust to external Azure resources like Function Apps, which can forge claims if compromised. The article details two scenarios—custom claims provider and custom authentication extension—and warns that the credential used by the extension is the critical security decision. Proper credential management and RBAC hardening are essential to prevent token forgery and privilege escalation.
Meridian48 take
The piece rightly emphasizes that Entra's extensibility model creates a new attack surface often overlooked by identity teams, but the real-world exploitability depends on how tightly organizations lock down their CI/CD pipelines and Azure RBAC.
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Securing the code that decides who Entra trusts: a Function App and a Logic App, end to end →
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