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CVE-2021-1724: Microsoft Dynamics Business Central Cross-site Scripting Vulnerability

• Severity: low (CVSS 2.3 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-02-25 · updated 2026-06-17
• Weakness: CWE-79

Description

Microsoft Dynamics Business Central Cross-site Scripting Vulnerability

Affected products

• Microsoft Dynamics 365 Business Central 2023 Release Wave 1: 2019-release_wave_2, 2020-release_wave_1, 2020-release_wave_2
• Microsoft Dynamics NAV 2018: 2015, 2016, 2017, 2018
• Microsoft Dynamics 365 Business Central 2019 Release Wave 2 (On-Premise): from 15.0.0 before publication — fixed in publication
• Microsoft Dynamics NAV 2018: from 1.0 before publication — fixed in publication
• Microsoft Dynamics 365 Business Central 2020 Release Wave 1: from 16.0.0 before publication — fixed in publication
• Microsoft Dynamics 365 Business Central 2020 Release Wave 2: from 17.0.0 before publication — fixed in publication
• Microsoft Dynamics NAV 2016: from 1.0 before publication — fixed in publication
• Microsoft Dynamics NAV 2017: from 1.0 before publication — fixed in publication

How to fix

Upgrade to a fixed version: Microsoft Dynamics 365 Business Central 2019 Release Wave 2 (On-Premise) publication; Microsoft Dynamics NAV 2018 publication; Microsoft Dynamics 365 Business Central 2020 Release Wave 1 publication; Microsoft Dynamics 365 Business Central 2020 Release Wave 2 publication; Microsoft Dynamics NAV 2016 publication; Microsoft Dynamics NAV 2017 publication. Check the vendor advisory for mitigations.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1724
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1724

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