Cross-site scripting (XSS) vulnerability in the Web Components Server in Microsoft Lync Server 2010 and 2013 allows remote attackers to inject arbitrary web script or HTML via a crafted URL containing a valid meeting ID, aka "Lync Server Content Sanitization Vulnerability."
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-032
http://www.securitytracker.com/id/1030381
http://www.securityfocus.com/bid/67893