Medium severity · published Dec 3, 2025
CVE-2025-20381
SPL commands allowlist controls bypass in Splunk MCP Server app through "run_splunk_query" MCP tool
5.4
CVSS
0.2%
EPSS
No
On KEV
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
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 13% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SM
Splunk MCP Server · Splunk
0.2 before 0.2.4 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-20381
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-20381
advisory.splunk.com
https://advisory.splunk.com/advisories/SVD-2025-1210
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