CVE-2025-20381 - CVE House
Back to Database
Status published Medium CVE-2025-20381

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

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2025-20381

Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Saket Pandey, Splunk

References

More from Splunk

View All →
CVE-2025-22621
Privilege escalation for users who hold the “splunk_app_soar“ role in the Splunk App for SOAR
Medium 6.4
CVE-2025-20389
Improper Input Validation in "label" column field in Splunk Secure Gateway App
Medium 4.3
CVE-2025-20388
Blind Server Side Request Forgery (SSRF) through Distributed Search Peers in Splunk Enterprise
Low 2.7
CVE-2025-20387
Incorrect permissions assignment on Splunk Universal Forwarder for Windows during new installation or upgrade
High 8
CVE-2025-20386
Incorrect permission assignment on Splunk Enterprise for Windows during new installation or upgrade
High 8

Affected Vendor

Affected Software

Splunk MCP Server
Vulnerable Versions:
0.2

Timeline

Official Publish: December 3rd, 2025
Last Modified: December 3rd, 2025
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

Weaknesses (CWE)

CWE-863

MITRE ATT&CK TTPs

T1190 Exploit Public-Facing Application
Initial Access
T1078 Valid Accounts
Persistence
T1548 Abuse Elevation Control Mechanism
Privilege Escalation
T1021 Remote Services
Lateral Movement
T1098 Account Manipulation
Defense Evasion