CVE-2023-21751: 
vulnerability analysis and mitigation

Azure DevOps Server Spoofing Vulnerability, identified as CVE-2023-21751, was disclosed in December 2023. The vulnerability affects Azure DevOps Server versions 2020.1.2 and 2022.1.0 (NVD).

The vulnerability has been assigned a CVSS v3.1 base score of 6.5 (Medium) with the vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N. This indicates that the vulnerability is network-accessible, requires low attack complexity, needs low privileges, requires no user interaction, and has high impact on integrity but no impact on confidentiality or availability. Microsoft has classified this as a spoofing vulnerability and it is associated with CWE-284 (Improper Access Control) (NVD).

The vulnerability could allow an attacker to conduct spoofing attacks against Azure DevOps Server. The impact primarily affects the system's integrity, with no direct impact on confidentiality or availability as indicated by the CVSS metrics (NVD).

Microsoft has released security updates to address this vulnerability. Users of affected Azure DevOps Server versions (2020.1.2 and 2022.1.0) should apply the available patches (NVD).

The vulnerability was disclosed as part of Microsoft's final Patch Tuesday of 2023, which addressed a total of 34 security flaws. This particular CVE was added to the update a day after the initial Patch Tuesday release (Hacker News).