Fortinet Discovers Microsoft SharePoint Cross-Site Scripting Vulnerability
Summary
Fortinet's FortiGuard Labs has discovered a Cross-Site Scripting (XSS) vulnerability in Microsoft SharePoint.
SharePoint is a web application platform in the Microsoft Office server suite. SharePoint combines various functions. SharePoint servers have traditionally been deployed for internal use in mid-size businesses and large departments alongside Microsoft Exchange, Skype for Business, and Office Web Application Server.
An XSS vulnerability has been discovered in SharePoint 2016. The vulnerability is caused due to insufficiently sanitizing user-supplied input in a number of input fields like notes, keywords and comments. It allows remote attackers to launch XSS attacks. Attackers can exploit this vulnerability to inject malicious JavaScript code to potentially issue SharePoint commands in the context of another authenticated user.
Solutions
FortiGuard Labs released the following FortiGate IPS signature which covers this specific vulnerability:MS.SharePoint.Notes.XSS
Released Jul 21, 2016
Users should apply the solution provided by Microsoft.
Timeline
Fortinet reported the vulnerability to Microsoft on June 08, 2016.
Microsoft confirmed the vulnerability on June 21, 2016.
Microsoft patched the vulnerability on January 10, 2017.