CVE-2025-20381CWE-863broken-access-control

CVE-2025-20381

Medium · published December 3, 2025

CVSS v3.1

5.4

EPSS

Percentile

11.9

In the wild

Unconfirmed

What it is

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.

The record

Technical detail

CVSS v3.1: 5.4 · MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
CVSS v4.0: Not supplied
EPSS: 0.00220 · 11.9th percentile
Weakness: CWE-863 · Incorrect Authorization
Published: 2025-12-03T22:15Z

References (1)

https://advisory.splunk.com/advisories/SVD-2025-1210 · [email protected]

EPSS history

Timeline

03 DEC 17:00Z
SPL commands allowlist controls bypass in Splunk MCP Server app through "run_splunk_query" MCP tool
cvelistv5