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CVE-2021-41354: Microsoft Dynamics 365 (on-premises) Cross-site Scripting Vulnerability

• Severity: low (CVSS 3.5 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-10-13 · updated 2026-06-17
• Weakness: CWE-79

Description

Microsoft Dynamics 365 (on-premises) Cross-site Scripting Vulnerability

Affected products

• Microsoft Dynamics 365 (on-premises) version 9.0: 9.0, 9.1
• Microsoft Dynamics 365 (on-premises) version 9.0: from 9.0.0 before 9.0.31.7 — fixed in 9.0.31.7

How to fix

Upgrade to a fixed version: Microsoft Dynamics 365 (on-premises) version 9.0 9.0.31.7. Check the vendor advisory for mitigations.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-41354
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-41354

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