How severe is CVE-2021-28459?

CVE-2021-28459 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-28459 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-28459?

CVE-2021-28459 affects Microsoft Azure Devops Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-28459?

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

When was CVE-2021-28459 published?

CVE-2021-28459 was published on 2021-04-13 and last updated on 2026-06-17.

CVE-2021-28459

CVE-2021-28459 is a medium-severity vulnerability in Microsoft Azure Devops Server with a CVSS 3.x base score of 6.1. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Microsoft Azure Devops Server
Published: 2021-04-13
Last modified: 2026-06-17

Description

Azure DevOps Server Spoofing Vulnerability

Frequently asked questions

What is CVE-2021-28459?: Azure DevOps Server Spoofing Vulnerability
How severe is CVE-2021-28459?: CVE-2021-28459 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-28459 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-28459?: CVE-2021-28459 affects Microsoft Azure Devops Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-28459?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-28459 published?: CVE-2021-28459 was published on 2021-04-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:microsoft:azure_devops_server:2020.0.1:-:*:*:*:*:*:*

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