CVE-2024-43503: 
vulnerability analysis and mitigation

Microsoft SharePoint Elevation of Privilege Vulnerability (CVE-2024-43503) was disclosed on October 8, 2024. This vulnerability affects multiple versions of Microsoft SharePoint, including SharePoint Server 2016 Enterprise, SharePoint Server 2019, and SharePoint Server Subscription Edition (NVD).

The vulnerability has been assigned a CVSS v3.1 base score of 7.8 (High) with the following vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. This indicates local access is required, with low attack complexity and privileges needed, no user interaction, and high impacts on confidentiality, integrity, and availability. The vulnerability is classified under CWE-284 (Improper Access Control) (NVD).

The vulnerability could allow an attacker to gain elevated privileges within SharePoint environments. The high CVSS scores for confidentiality, integrity, and availability (all rated as High) indicate that successful exploitation could result in significant system compromise (Microsoft Update Guide).

Microsoft has released security updates to address this vulnerability. For SharePoint Server 2016, update KB5002645 (build 16.0.5469.1000) is available. For SharePoint Server 2019, update KB5002647 (build 16.0.10415.20001) has been released. These updates can be obtained through Microsoft Update, Microsoft Update Catalog, or the Microsoft Download Center (SharePoint 2016 Update, SharePoint 2019 Update).