CVE-2025-20378: 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…

PriorityP431medium6.1CVSS 3.1

AVNACLPRNUIRSCCLILAN

EPSS

0.21%

10.5th percentile

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.

Affected

11 ranges

Vendor	Product	Version range	Fixed in
splunk	splunk	—	—
splunk	splunk	>= 9.2.0 < 9.2.9	9.2.9
splunk	splunk	>= 9.3.0 < 9.3.7	9.3.7
splunk	splunk	>= 9.4.0 < 9.4.5	9.4.5
splunk	splunk_cloud_platform	>= 10.0.2503 < 10.0.2503.5	10.0.2503.5
splunk	splunk_cloud_platform	>= 9.3.2408 < 9.3.2408.121	9.3.2408.121
splunk	splunk_cloud_platform	>= 9.3.2411 < 9.3.2411.111	9.3.2411.111
splunk	splunk_enterprise	>= 10.0 < 10.0.1	10.0.1
splunk	splunk_enterprise	>= 9.2 < 9.2.9	9.2.9
splunk	splunk_enterprise	>= 9.3 < 9.3.7	9.3.7
splunk	splunk_enterprise	>= 9.4 < 9.4.5	9.4.5

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