CVE-2025-20381: Splunk Mcp Server

Medium severity, CVSS 5.4. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Splunk Splunk Mcp Server: from 0.2, before 0.2.4 (fixed in 0.2.4)

Published 2025-12-03. Last modified 2026-06-17.