CVE-2025-20378

Severity CVSS v4.0:

Pending analysis

Type:

CWE-601 URL Redirection to Untrusted Site ('Open Redirect')

Publication date:

12/11/2025

Last modified:

03/12/2025

Description

In Splunk Enterprise versions below 10.0.1, 9.4.5, 9.3.7, 9.2.9, and Splunk Cloud Platform versions below 10.0.2503.5, 9.3.2411.111, and 9.3.2408.121, an unauthenticated attacker could craft a malicious URL using the `return_to` parameter of the Splunk Web login endpoint. When an authenticated user visits the malicious URL, it could cause an unvalidated redirect to an external malicious site. To be successful, the attacker has to trick the victim into initiating a request from their browser. The unauthenticated attacker should not be able to exploit the vulnerability at will.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N CVSS v3.1 Severity and Metrics:

Base Score: 3.10 LOW
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): Required
Scope (S): Unchanged
Confidentiality (C): Low
Integrity (I): None
Availability (A): None

Base Score 3.x

3.10

Severity 3.x

LOW

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:splunk:splunk:::::enterprise:::*	9.2.0 (including)	9.2.9 (excluding)
cpe:2.3:a:splunk:splunk:::::enterprise:::*	9.3.0 (including)	9.3.7 (excluding)
cpe:2.3:a:splunk:splunk:::::enterprise:::*	9.4.0 (including)	9.4.5 (excluding)
cpe:2.3:a:splunk:splunk:10.0.0::::enterprise:::
cpe:2.3:a:splunk:splunk_cloud_platform::::::::	9.3.2408 (including)	9.3.2408.121 (excluding)
cpe:2.3:a:splunk:splunk_cloud_platform::::::::	9.3.2411 (including)	9.3.2411.111 (excluding)
cpe:2.3:a:splunk:splunk_cloud_platform::::::::	10.0.2503 (including)	10.0.2503.5 (excluding)

To consult the complete list of CPE names with products and versions, see this page

References to Advisories, Solutions, and Tools

https://advisory.splunk.com/advisories/SVD-2025-1101