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CVE-2025-20381

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

Published: Dec 3, 2025Updated: Dec 4, 2025 Sources: CVE List NVD BDUCWE-863
NVD MITRE
5.4CVSSMEDIUM
EPSS Score
0.2%
Top 91.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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 Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:NI:LA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:LAvailability
Low
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Weaknesses

CWE-863

Affected Products

Splunk MCP ServerSplunkSecurity Products
Splunk MCP ServerSplunk Inc.Security Products
splunkcommercialUSSecurity Productsaka splunk enterprise, splunk cloud platform
splunk inc.commercialUSSecurity Productsaka splunk

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://advisory.splunk.com/advisories/SVD-2025-1210
advisory.splunk.com
https://advisory.splunk.com/advisories/SVD-2025-1210
advisory.splunk.com
https://github.com/advisories/GHSA-qf9v-6rq4-3w87
github.com

Timeline

Published
Dec 3, 2025
Last Updated
Dec 4, 2025

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