Vulnerability 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 Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Splunk | Splunk | >= 9.2.0, < 9.2.9 |
| Splunk | Splunk Cloud Platform | >= 9.3.2408, < 9.3.2408.121 |
Related Weaknesses (CWE)
References
- https://advisory.splunk.com/advisories/SVD-2025-1101Vendor Advisory
FAQ
What is CVE-2025-20378?
CVE-2025-20378 is a vulnerability with a CVSS score of 3.1 (LOW). 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 malicio...
How severe is CVE-2025-20378?
CVE-2025-20378 has been rated LOW with a CVSS base score of 3.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-20378?
Check the references section above for vendor advisories and patch information. Affected products include: Splunk Splunk, Splunk Splunk Cloud Platform.