CVE-2025-20381

SPL commands allowlist controls bypass in Splunk MCP Server app through "run_splunk_query" MCP tool

Published Dec 3, 2025 CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Splunk
Splunk mcp Server
Vendors & Products Splunk
Splunk mcp Server
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title SPL commands allowlist controls bypass in Splunk MCP Server app through "run_splunk_query" MCP tool
Weaknesses CWE-863
References
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
cisco
Published
Updated
Dec 3, 2025, 9:29 PM
Reserved
Oct 10, 2024, 7:15 PM
Status
Deferred
Published
Dec 3, 2025, 5:15 PM
Modified
Oct 18, 2026, 5:10 PM