Microsoft SharePoint Server 2010 SP1 and SharePoint Foundation 2010 SP1 allow remote attackers to bypass intended read restrictions for content, and hijack user accounts, via a crafted URL, aka "Callback Function Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16596
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-024