CVE-2025-20378
Last modified
CVE-2025-20378 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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. EPSS estimates a 0.21% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| 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 |
| 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
- https://advisory.splunk.com/advisories/SVD-2025-1101Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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