CVE-2025-20378

MEDIUM EPSS 10.5%

Published Nov 12, 20257mo ago · Modified Jun 17, 20262w ago

6.1 CVSS 3.1

Medium

Published Nov 12, 2025 7mo ago

Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score

6.1

Exploitability

2.8

Impact

2.7

Vector string

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector Network

Attack Complexity Low

Privileges Required None

User Interaction Required

Scope Changed

Confidentiality Low

Integrity Low

Availability None

Threat Intelligence

EPSS Exploit Probability

10.5% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-601

Affected Products 7

Vendor	Product	Version	Range
splunk	splunk	*	≥9.2.0 – <9.2.9
splunk	splunk	*	≥9.3.0 – <9.3.7
splunk	splunk	*	≥9.4.0 – <9.4.5
splunk	splunk	10.0.0	any
splunk	splunk_cloud_platform	*	≥9.3.2408 – <9.3.2408.121
splunk	splunk_cloud_platform	*	≥9.3.2411 – <9.3.2411.111
splunk	splunk_cloud_platform	*	≥10.0.2503 – <10.0.2503.5

References 1

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

Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.