CVE-2025-20378
Dec. 3, 2025, 9:43 p.m.
3.1
Low
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 |
|
|
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 | / | / | / |
| a | splunk | splunk | / | / | / | / | enterprise | / | / | / |
| a | splunk | splunk | / | / | / | / | enterprise | / | / | / |
| a | splunk | splunk | 10.0.0 | / | / | / | enterprise | / | / | / |
| a | splunk | splunk_cloud_platform | / | / | / | / | / | / | / | / |
| a | splunk | splunk_cloud_platform | / | / | / | / | / | / | / | / |
| a | splunk | splunk_cloud_platform | / | / | / | / | / | / | / | / |
Tags
CVSS Score
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
Timeline
Published: Nov. 12, 2025, 6:15 p.m.
Last Modified: Dec. 3, 2025, 9:43 p.m.
Last Modified: Dec. 3, 2025, 9:43 p.m.
Status : Analyzed
CVE has had analysis completed and all data associations made.
More infoSource
psirt@cisco.com
*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.