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CVE-2021-36946: Microsoft Dynamics Business Central Cross-site Scripting Vulnerability

• Severity: low (CVSS 3.5 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-08-12 · updated 2026-08-10
• Weakness: CWE-79

Description

Microsoft Dynamics Business Central Cross-site Scripting Vulnerability

Affected products

• Microsoft Dynamics 365 Business Central 2023 Release Wave 1: 2019-spring_update, 2020-release_wave_1, 2020-release_wave_2
• Microsoft Dynamics NAV 2018: 2017, 2018
• Microsoft Dynamics 365 Business Central Spring 2019 Update: from 14.0.0 before 14.0.47540 — fixed in 14.0.47540
• Microsoft Dynamics NAV 2018: from 1.0 before 47562 — fixed in 47562
• Microsoft Dynamics 365 Business Central 2020 Release Wave 1 - Update 16.15: from 16.0 before 16.0.28457 — fixed in 16.0.28457
• Microsoft Dynamics 365 Business Central 2020 Release Wave 2 - Update 17.9: from 17.0 before 17.0.28458 — fixed in 17.0.28458
• Microsoft Dynamics NAV 2017: from 1.0 before 30601 — fixed in 30601

How to fix

Upgrade to a fixed version: Microsoft Dynamics 365 Business Central Spring 2019 Update 14.0.47540; Microsoft Dynamics NAV 2018 47562; Microsoft Dynamics 365 Business Central 2020 Release Wave 1 - Update 16.15 16.0.28457; Microsoft Dynamics 365 Business Central 2020 Release Wave 2 - Update 17.9 17.0.28458; Microsoft Dynamics NAV 2017 30601. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36946
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36946

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