If a knowledge base has no user criteria, who can read/write articles within that KB?

In ServiceNow, if a knowledge base does not have any user criteria defined, it means there are no restrictions placed on who can access or modify the articles within that knowledge base. Therefore, by default, all users who possess any roles in ServiceNow can read and write articles in that knowledge base.

The absence of user criteria allows for maximum accessibility, meaning both internal users—such as employees and other staff—and any external users with access to the ServiceNow platform can contribute to or utilize the knowledge base articles. This setup is important for situations where a collective and open contribution is desired, encouraging knowledge sharing across the organization without barriers.

In contrast, when user criteria are set, only those specified (like specific groups or roles) would be able to interact with the knowledge base's content, limiting access to a select group defined by administrative oversight.