CVE-2025-20370: Splunk

Medium severity, CVSS 4.9. EPSS: 0.6% chance of exploitation in the next 30 days.

In Splunk Enterprise versions below 10.0.1, 9.4.4, 9.3.6, and 9.2.8, and Splunk Cloud Platform versions below 9.3.2411.108, 9.3.2408.118 and 9.2.2406.123, a user who holds a role that contains the high-privilege capability `change_authentication`, could send multiple LDAP bind requests to a specific internal endpoint, resulting in high server CPU usage, which could potentially lead to a denial of service (DoS) until the Splunk Enterprise instance is restarted. See https://help.splunk.com/en/splunk-enterprise/administer/manage-users-and-security/10.0/manage-splunk-platform-users-and-roles/define-roles-on-the-splunk-platform-with-capabilities and https://help.splunk.com/en/splunk-enterprise/administer/manage-users-and-security/10.0/use-ldap-as-an-authentication-scheme/configure-ldap-with-splunk-web#cfe47e31_007f_460d_8b3d_8505ffc3f0dd__Configure_LDAP_with_Splunk_Web for more information.

Affected products

• Splunk Splunk: from 9.2.0, before 9.2.8 (fixed in 9.2.8); from 9.3.0, before 9.3.6 (fixed in 9.3.6); from 9.4.0, before 9.4.4 (fixed in 9.4.4); version 10.0.0 only
• Splunk Splunk Cloud Platform: from 9.2.2406, before 9.2.2406.123 (fixed in 9.2.2406.123); from 9.3.2408, before 9.3.2408.118 (fixed in 9.3.2408.118); from 9.3.2411, before 9.3.2411.108 (fixed in 9.3.2411.108)

Published 2025-10-01. Last modified 2026-06-17.