Vulnerability · Published Nov 12, 2025 · Assigned by cisco
CVE-2025-20378Open Redirect on Web Login endpoint in Splunk Enterprise
Low 3.1
In plain English
A low-severity open redirect in Splunk Cloud Platform from Splunk. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 17% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Splunk | Splunk Enterprise | 10.0 – before 10.0.19.4 – before 9.4.59.3 – before 9.3.79.2 – before 9.2.9 |
| Splunk | Splunk Cloud Platform | 10.0.2503 – before 10.0.2503.59.3.2411 – before 9.3.2411.1119.3.2408 – before 9.3.2408.121 |
Weakness: CWE-601 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N