What’s Vulnerable › Vulnerabilities

CVE-2019-1229: Dynamics On-Premise Elevation of Privilege Vulnerability

• Severity: high (CVSS 8.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-08-14 · updated 2026-06-17

Description

An elevation of privilege vulnerability exists in Dynamics On-Premise v9. An attacker who successfully exploited the vulnerability could leverage a customizer privilege within Dynamics to gain control of the Web Role hosting the Dynamics installation. To exploit this vulnerability, an attacker needs to have credentials for a user that has permission to author customized business rules in Dynamics, and persist XAML script in a way that causes it to be interpreted as code. The update addresses the vulnerability by restricting XAML activities to a whitelisted set.

Affected products

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

How to fix

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

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1229
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1229

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