CVE-2020-1148: 
vulnerability analysis and mitigation

A spoofing vulnerability (CVE-2020-1148) was identified in Microsoft SharePoint Server that occurs when the server fails to properly sanitize specially crafted web requests. This vulnerability was disclosed on June 9, 2020, affecting multiple versions of SharePoint including SharePoint Enterprise Server 2013 SP1, SharePoint Enterprise Server 2016, SharePoint Server 2010 SP2, and SharePoint Server 2019 (NVD).

The vulnerability has been assigned a CVSS v3.1 Base Score of 5.4 (Medium) with the vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N. The vulnerability is related to improper neutralization of input during web page generation (CWE-79) and requires user interaction for successful exploitation (NVD).

If exploited, this vulnerability could allow an attacker to perform spoofing attacks against affected SharePoint servers. The attack can lead to limited confidentiality and integrity impacts, though there is no impact on system availability (NVD).

The vulnerability requires network access and low privilege levels for exploitation. User interaction is necessary for a successful attack, making it somewhat more difficult to exploit in practice (NVD).

Microsoft has released security updates to address this vulnerability. Organizations running affected versions of SharePoint Server should apply the appropriate security patches through Microsoft's standard update channels (Microsoft Advisory).