CVE-2025-20382: Splunk

Medium severity, CVSS 5.4. EPSS: 0.2% chance of exploitation in the next 30 days.

In Splunk Enterprise versions below 10.0.2, 9.4.6, 9.3.8, and 9.2.10, and Splunk Cloud Platform versions below 10.1.2507.10, 10.0.2503.8, and 9.3.2411.120, a low-privileged user that does not hold the "admin" or "power" Splunk roles could create a views dashboard with a custom background using the `data:image/png;base64` protocol that could potentially lead to an unvalidated redirect. This behavior circumvents the Splunk external URL warning mechanism by using a specially crafted URL, allowing for a redirection to an external malicious site. The vulnerability requires the attacker to phish the victim by tricking them into initiating a request within their browser. The authenticated user should not be able to exploit the vulnerability at will.

Affected products

• Splunk Splunk: from 9.2.0, before 9.2.10 (fixed in 9.2.10); from 9.3.0, before 9.3.8 (fixed in 9.3.8); from 9.4.0, before 9.4.6 (fixed in 9.4.6); from 10.0.0, before 10.0.2 (fixed in 10.0.2)
• Splunk Splunk Cloud Platform: from 9.3.2411, before 9.3.2411.120 (fixed in 9.3.2411.120); from 10.0.2503, before 10.0.2503.8 (fixed in 10.0.2503.8); from 10.1.2507, before 10.1.2507.10 (fixed in 10.1.2507.10)

Published 2025-12-03. Last modified 2026-06-17.