Affected: Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Foundation 2010 Service Pack 2, Microsoft SharePoint Foundation 2013 Service Pack 1, Microsoft SharePoint Server 2019

An information disclosure vulnerability exists in the way Microsoft SharePoint handles session objects. An authenticated attacker who successfully exploited the vulnerability could hijack the session of another user. To exploit this vulnerability, the attacker could run a specially crafted application. The security update corrects how SharePoint handles session objects to prevent user session hijacking.