Microsoft Entra application registration with dangling URI

An exposed redirect URI can be used by attackers to discover and exploit exposed authorization tokens, increasing the risk of credential exposure. This allows attackers to gain access to user sessions' authentication information.

Attackers can use a discovered dangling URI to register a new App Server instance and obtain user sessions' authorization tokens, which can be used for malicious purposes such as lateral movement or privilege escalation through OAuth token abuse. This provides attackers with the capability to access sensitive information and compromise user accounts.

Cayosoft Guardian continuously monitors app registrations in the Microsoft Entra service for exposed redirect URIs, flagging any found as security issues to alert administrators of potential exposure and provide visibility into security posture.

Cayosoft Guardian helps reduce the risk by alerting administrators to remove exposed redirect URIs from app registrations, limiting the potential for attackers to discover and exploit exposed authorization tokens and reducing credential exposure. This supports investigation and response efforts by providing a clear audit trail of security events.