What is the CVSS score of CVE-2025-20381?

CVE-2025-20381 has a CVSS 3.1 base score of 5.4 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L. EPSS exploitation probability: 0.1%.

Which versions of MCP are affected by CVE-2025-20381?

Organizations using Splunk MCP Server app should be aware of moderate risk from CVE-2025-20381, a incorrect authorization vulnerability rated CVSS 5.4.. A patch is available.

How to fix or mitigate CVE-2025-20381?

Within 30 days: Identify affected systems running Splunk MCP Server app and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

MCP CVE-2025-20381

EUVD-2025-200993 MEDIUM

Incorrect Authorization (CWE-863)

2025-12-03 psirt@cisco.com

Authentication Bypass

5.4

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.4 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

Low

Lifecycle Timeline

Patch available

Apr 16, 2026 - 05:29 EUVD

0.2.4

EUVD ID Assigned

Mar 15, 2026 - 16:14 euvd

EUVD-2025-200993

Analysis Generated

Mar 15, 2026 - 16:14 vuln.today

CVE Published

Dec 03, 2025 - 17:15 nvd

MEDIUM 5.4

DescriptionCVE.org

In Splunk MCP Server app versions below 0.2.4, a user with access to the "run_splunk_query" Model Context Protocol (MCP) tool could bypass the SPL command allowlist controls in MCP by embedding SPL commands as sub-searches, leading to unauthorized actions beyond the intended MCP restrictions.