BaseFortify

Publication date: 2025-12-03

Last updated on: 2025-12-04

Assigner: Cisco Systems, Inc.

Description

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.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2025-12-03

Last Modified

2025-12-04

Generated

2026-07-06

AI Q&A

2025-12-03

EPSS Evaluated

2026-07-05

NVD

CVE-2025-20381

EUVD

EUVD-2025-200993

Affected Vendors & Products

Vendor	Product	Version / Range
splunk	mcp_server_app	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-863	The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

Attack-Flow Graph

Executive Summary

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

Impact Analysis

The vulnerability can lead to unauthorized actions being performed within the Splunk MCP Server app, potentially allowing a user to execute commands that should be restricted. This could result in integrity and availability impacts on the system, as indicated by the CVSS score.

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