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CVE-2020-17145: Azure DevOps Server and Team Foundation Services Spoofing Vulnerability

• Severity: medium (CVSS 4.9 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-12-09 · updated 2026-06-17

Description

Azure DevOps Server and Team Foundation Services Spoofing Vulnerability

Affected products

• Microsoft Azure DevOps Server: 2019-update1.1, 2019.0.1, 2020
• Microsoft Team Foundation Server 2018: 2015-4.2, 2017-3.1, 2018-1.2, 2018-3.2
• Microsoft Azure DevOps Server: from 1.0 before publication — fixed in publication
• Microsoft Azure DevOps Server 2019.0.1: from 2019.0.0 before publication — fixed in publication
• Microsoft Azure DevOps Server 2020: from 2020 before publication — fixed in publication
• Microsoft Team Foundation Server 2015 Update 4.2: from 4.0 before publication — fixed in publication
• Microsoft Team Foundation Server 2017 Update 3.1: from 3.0 before publication — fixed in publication
• Microsoft Team Foundation Server 2018 Update 1.2: from 1.0 before publication — fixed in publication
• Microsoft Team Foundation Server 2018 Update 3.2: from 3.0 before publication — fixed in publication

How to fix

Upgrade to a fixed version: Microsoft Azure DevOps Server publication; Microsoft Azure DevOps Server 2019.0.1 publication; Microsoft Azure DevOps Server 2020 publication; Microsoft Team Foundation Server 2015 Update 4.2 publication; Microsoft Team Foundation Server 2017 Update 3.1 publication; Microsoft Team Foundation Server 2018 Update 1.2 publication; Microsoft Team Foundation Server 2018 Update 3.2 publication. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-17145
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17145

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