Microsoft Exchange Server Spoofing Vulnerability

According to the CVSS metrics, successful exploitation of this vulnerability could lead to some loss of confidentiality (C:L), and integrity (I:L) but lead to no loss of availability (A:N). What is the impact of this vulnerability?
An attacker who successfully exploited the vulnerability could view some sensitive information (Confidentiality), make changes to disclosed information (Integrity), but cannot limit access to the resource (Availability).

According to the CVSS metric, a successful exploitation could lead to a scope change (S:C). What does this mean for this vulnerability?
An exploited vulnerability can affect resources beyond the security scope managed by the security authority of the vulnerable component. In this case, the vulnerable component and the impacted component are different and managed by different security authorities.

According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do?
User interaction in the Exchange Control Panel (ECP) is required to exploit this vulnerability.

Security updates
15.02.1544.043 — https://support.microsoft.com/help/5103214
15.02.2562.045 — https://support.microsoft.com/help/5103212
15.02.1748.048 — https://support.microsoft.com/help/5103213
15.01.2507.071 — https://support.microsoft.com/help/5103215