Microsoft SharePoint Server 2007 SP3, SharePoint Foundation 2010 SP2, SharePoint Server 2010 SP2, and SharePoint Foundation 2013 SP1 allow remote authenticated users to execute arbitrary code via crafted page content, aka "Microsoft SharePoint Page Content Vulnerabilities."
Improper Input Validation The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly.