What’s Vulnerable › Vulnerabilities
CVE-2025-20381: SPL commands allowlist controls bypass in Splunk MCP Server app through "run_splunk_query" MCP tool
- Severity: medium (CVSS 5.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2025-12-03 · updated 2026-10-18
- Weakness: CWE-863
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.
Affected products
- Splunk MCP Server: from 0.2 before 0.2.4 — fixed in 0.2.4
How to fix
Upgrade to a fixed version: Splunk MCP Server 0.2.4. Check the vendor advisory for mitigations.
References
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