CVE-2025-20324: Improper Access Control in System Source Types Configuration in Splunk Enterprise

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-07-07 · updated 2026-06-17
Weakness: CWE-284

Description

In Splunk Enterprise versions below 9.4.2, 9.3.5, 9.2.7, and 9.1.10 and Splunk Cloud Platform versions below 9.3.2411.104, 9.3.2408.113, and 9.2.2406.119, a low-privileged user that does not hold the "admin" or "power" Splunk roles could create or overwrite [system source type](https://help.splunk.com/en/splunk-enterprise/get-started/get-data-in/9.2/configure-source-types/create-source-types) configurations by sending a specially-crafted payload to the `/servicesNS/nobody/search/admin/sourcetypes/` REST endpoint on the Splunk management port.

Affected products

Splunk Enterprise: from 9.1.0 before 9.1.10; from 9.2.0 before 9.2.7; from 9.3.0 before 9.3.5; from 9.4.0 before 9.4.2 — fixed in 9.1.10, 9.2.7, 9.3.5, 9.4.2
Splunk Cloud Platform: from 9.2.2406 before 9.2.2406.119; from 9.3.2408 before 9.3.2408.113; from 9.3.2411 before 9.3.2411.104 — fixed in 9.2.2406.119, 9.3.2408.113, 9.3.2411.104

How to fix

Upgrade to a fixed version: Splunk Enterprise 9.1.10, 9.2.7, 9.3.5, 9.4.2; Splunk Cloud Platform 9.2.2406.119, 9.3.2408.113, 9.3.2411.104. Check the vendor advisory for mitigations.

References

https://advisory.splunk.com/advisories/SVD-2025-0707

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