Resource exhaustion in Splunk
CVE-2025-20370
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.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.006 (44.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.006 · change: +0.000
Affected products
- Splunk — versions 10.0.0
- Splunk Cloud Platform
- Splunk Enterprise — versions 10.0, 9.4, 9.3
- Splunk Enterprise Cloud — versions 9.3.2411, 9.3.2408, 9.2.2406
Weakness classification (CWE)
References
- advisory.splunk.com/advisories/SVD-2025-1005 (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-20370?
- CVE-2025-20370 is a medium-severity vulnerability in Splunk, classified under Uncontrolled Resource Consumption. CVSS score: 4.9/10. Published 2025-10-01.
- How severe is CVE-2025-20370?
- Medium severity. CVSS v3 base score is 4.9 out of 10.