SecuriTricks - CVE-2025-20378

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.

Product(s) Impacted

Vendor	Product	Versions
Splunk	Splunk Enterprise Splunk Cloud Platform	<10.0.1 <10.0.2503.5

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-601

URL Redirection to Untrusted Site ('Open Redirect')

A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks.

*CPE(s)

Affected systems and software identified for this CVE.

Type	Vendor	Product	Version	Update	Edition	Language	Software Edition	Target Software	Target Hardware	Other Information
a	splunk	splunk_enterprise	<10.0.1	/	/	/	/	/	/	/
a	splunk	splunk_cloud_platform	<10.0.2503.5	/	/	/	/	/	/	/

References

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

CVSS Score

3.1 / 10

CVSS Data - 3.1

Attack Vector: NETWORK
Attack Complexity: HIGH
Privileges Required: NONE
Scope: UNCHANGED
Confidentiality Impact: LOW
Integrity Impact: NONE
Availability Impact: NONE

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

View Vector String

Timeline

Published: Nov. 12, 2025, 6:15 p.m.
Last Modified: Nov. 12, 2025, 6:15 p.m.

Status : Received

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

psirt@cisco.com

CVE-2025-20378