Microsoft Entra tenant with Microsoft 365 groups exposed to the whole organization

This issue is rated low severity because an attacker would need to add themselves to the public group using the Microsoft Entra admin center, which requires some level of effort and context. However, it's essential to note that this vulnerability can be exploited by attackers with minimal privileges.

A threat actor can add themselves to a public group using the Microsoft Entra admin center, granting access to resources like SharePoint documents or Teams chats without explicit permissions. They can then use this access for reconnaissance, data exfiltration, or other malicious activities, ultimately enabling persistence and lateral movement within the organization.

Cayosoft Guardian continuously monitors group privacy settings across your Microsoft 365 environment and flags public groups as security issues, alerting administrators to potential exposure.

Cayosoft Guardian alerts administrators to review and adjust group privacy settings, supporting ongoing monitoring to catch any changes that re-enable public groups, limiting exposure and potential attacker access. Additionally, Cayosoft Guardian provides visibility into group membership and resource access, enabling swift response and mitigation of the vulnerability.