In February 2013, Mejri reported a critical vulnerability in the validation of Microsoft's official SharePoint Cloud Web-application. At the beginning of September 2013, Symantec Security Company and SANS Institute investigated the newly detected vulnerability in SharePoint.CVE ID 2013 -3179 Microsoft In the same year, Mejri submitted 16 confirmed vulnerabilities in Office 365 cloud software to the Microsoft Security Response Center. By the end of 2013, all reported vulnerabilities were closed by Microsoft's development and security department.
