Open redirect vulnerability in Microsoft Office SharePoint Server 2007 SP2 and SP3 allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via a crafted URL, aka "SharePoint URL Redirection Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15657
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-050