CVE-2025-20381— SPL commands allowlist controls bypass in Splunk MCP Server app through "run_splunk_query" MCP tool
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I. Basic Information for CVE-2025-20381
Vulnerability Information
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Vulnerability Title
SPL commands allowlist controls bypass in Splunk MCP Server app through "run_splunk_query" MCP tool
Source: NVD (National Vulnerability Database)
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
授权机制不正确
Source: NVD (National Vulnerability Database)
Vulnerability Title
Splunk MCP Server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Splunk MCP Server是美国Splunk公司的一个多云平台服务器。 Splunk MCP Server 0.2.4之前版本存在安全漏洞，该漏洞源于run_splunk_query工具可绕过SPL命令允许列表控制，可能导致未授权操作。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Splunk | Splunk MCP Server | 0.2 ~ 0.2.4 | - |
II. Public POCs for CVE-2025-20381
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Splunk · 2025-12-03 · 9 CVEs total
| CVE-2025-20387 | 8.0 HIGH | Incorrect permissions assignment on Splunk Universal Forwarder for Windows during new inst |
| CVE-2025-20386 | 8.0 HIGH | Incorrect permission assignment on Splunk Enterprise for Windows during new installation o |
| CVE-2025-20384 | 5.3 MEDIUM | Unauthenticated Log Injection in Splunk Enterprise |
| CVE-2025-20389 | 4.3 MEDIUM | Improper Input Validation in "label" column field in Splunk Secure Gateway App |
| CVE-2025-20383 | 4.3 MEDIUM | Improper access control through push notifications for reports and alerts in Splunk Secure |
| CVE-2025-20382 | 3.5 LOW | URL validation bypass through Views Dashboard in Splunk Enterprise |
| CVE-2025-20388 | 2.7 LOW | Blind Server Side Request Forgery (SSRF) through Distributed Search Peers in Splunk Enterp |
| CVE-2025-20385 | 2.4 LOW | Stored Cross-Site scripting (XSS) through Anchor Tag "href" in Navigation Bar Collections |
IV. Related Vulnerabilities
Same vendor: Splunk
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Improper Input Validation during User Account Creation in Sp - CVE-2026-20163
Remote Command Execution (RCE) through the '/splunkd/__uploa
Same weakness: CWE-863
- CVE-2025-10908
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V. Comments for CVE-2025-20381
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