CVE-2023-22938: Permissions Validation Failure in the ‘sendemail’ REST API Endpoint in Splunk Enterprise

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-02-14 · updated 2026-06-17
Weakness: CWE-285

Description

In Splunk Enterprise versions below 8.1.13, 8.2.10, and 9.0.4, the ‘sendemail’ REST API endpoint lets any authenticated user send an email as the Splunk instance. The endpoint is now restricted to the ‘splunk-system-user’ account on the local instance.

Affected products

Splunk Enterprise: from 8.1.0 before 8.1.13; from 8.2.0 before 8.2.10; from 9.0.0 before 9.0.4 — fixed in 8.1.13, 8.2.10, 9.0.4
Splunk Cloud Platform: before 9.0.2209.3 — fixed in 9.0.2209.3

How to fix

Upgrade to a fixed version: Splunk Enterprise 8.1.13, 8.2.10, 9.0.4; Splunk Cloud Platform 9.0.2209.3. Check the vendor advisory for mitigations.

References

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