What is CVE-2023-21751?

CVE-2023-21751 is a medium-severity vulnerability in Microsoft Azure Devops Server, classified under Improper Access Control. CVSS score: 6.5/10. Published 2023-12-14.

How severe is CVE-2023-21751?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Microsoft Azure Devops Server

CVE-2023-21751

Azure DevOps Server Spoofing Vulnerability

Published 2023-12-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.010 (60.7th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 60.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Microsoft Azure Devops Server — versions 2020.1.2, 2022.1.0
Microsoft Azure Devops Server 2020.1.2 — versions 2020.1.0
Microsoft Azure Devops Server 2022 — versions 20231128.1

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21751 (vendor-advisory, Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2023-21751?: CVE-2023-21751 is a medium-severity vulnerability in Microsoft Azure Devops Server, classified under Improper Access Control. CVSS score: 6.5/10. Published 2023-12-14.
How severe is CVE-2023-21751?: Medium severity. CVSS v3 base score is 6.5 out of 10.