How severe is CVE-2023-21751?

CVE-2023-21751 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2023-21751 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-21751?

CVE-2023-21751 primarily affects Microsoft Azure Devops Server. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-21751?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-21751 published?

CVE-2023-21751 was published on 2023-12-14 and last updated on 2026-06-17.

CVE-2023-21751

CVE-2023-21751 is a medium-severity vulnerability in Microsoft Azure Devops Server with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-284.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 1% (58th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-284
Affected product: Microsoft Azure Devops Server
Published: 2023-12-14
Last modified: 2026-06-17

Description

Azure DevOps Server Spoofing Vulnerability

Frequently asked questions

What is CVE-2023-21751?: Azure DevOps Server Spoofing Vulnerability
How severe is CVE-2023-21751?: CVE-2023-21751 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2023-21751 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-21751?: CVE-2023-21751 primarily affects Microsoft Azure Devops Server. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-21751?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-21751 published?: CVE-2023-21751 was published on 2023-12-14 and last updated on 2026-06-17.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21751

Affected products (2)

cpe:2.3:o:microsoft:azure_devops_server:2020.1.2:-:*:*:*:*:*:*
cpe:2.3:o:microsoft:azure_devops_server:2022.1.0:*:*:*:*:*:*:*

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