CVE-2023-33132: 
vulnerability analysis and mitigation

Microsoft SharePoint Server Spoofing Vulnerability (CVE-2023-33132) was disclosed on June 13, 2023, affecting SharePoint Server 2019 and SharePoint Server Subscription Edition. The vulnerability was identified and reported to Microsoft, who subsequently released security updates to address this issue (Microsoft Update).

The vulnerability has been assigned a CVSS v3.1 base score of 6.3 (Medium) with the following vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N. Microsoft has classified this as a spoofing vulnerability, and it has been associated with CWE-79 (Improper Neutralization of Input During Web Page Generation - Cross-site Scripting) (NVD Database).

The vulnerability could potentially allow an attacker to perform spoofing attacks against SharePoint Server installations. Given the CVSS scoring, it indicates that the vulnerability could lead to high confidentiality impact and low integrity impact, with no availability impact (Microsoft Update).

Microsoft has released security updates to address this vulnerability. For SharePoint Server 2019, the fix is included in KB5002402, and for SharePoint Server Subscription Edition, it's included in KB5002416. Users are advised to apply these security updates through Microsoft Update, Microsoft Update Catalog, or Microsoft Download Center (Microsoft Support).