CVE-2019-1229: Microsoft Dynamics 365

High severity, CVSS 8.8. EPSS: 3.5% chance of exploitation in the next 30 days.

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: version 9.0 only

Published 2019-08-14. Last modified 2026-06-17.