What is the CVSS score of CVE-2025-30391?

CVE-2025-30391 has a CVSS 3.1 base score of 8.1 (High). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 1.0%.

Which versions of Dynamics 365 Customer Service are affected by CVE-2025-30391?

Organizations using Improper input validation in Microsoft Dynamics face notable risk from CVE-2025-30391, a input validation vulnerability rated CVSS 8.1.

How to fix or mitigate CVE-2025-30391?

Within 7 days: Identify all affected systems and apply vendor patches promptly. Monitor vendor channels for patch availability.

Dynamics 365 Customer Service CVE-2025-30391

HIGH

Improper Input Validation (CWE-20)

2025-04-30 secure@microsoft.com

Microsoft Information Disclosure Dynamics 365 Customer Service

8.1

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.1 HIGH

AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:39 vuln.today

CVE Published

Apr 30, 2025 - 18:15 nvd

HIGH 8.1

DescriptionCVE.org

Improper input validation in Microsoft Dynamics allows an unauthorized attacker to disclose information over a network.

AnalysisAI

Improper input validation in Microsoft Dynamics allows an unauthorized attacker to disclose information over a network. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-20. Improper input validation in Microsoft Dynamics allows an unauthorized attacker to disclose information over a network. Affected products include: Microsoft Dynamics 365 Customer Service.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.