CVE-2025-20382

Low

Description

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.

SeverityLow
CVSS3.5
Exploit probability—
ProductSplunk
PublishedDec 3, 2025
First seenDec 3, 2025

How to fix

Update
  • splunk splunk9.2.10, 9.3.8, 9.4.6, 10.0.2 or later
  • splunk splunk_cloud_platform9.3.2411.120, 10.0.2503.8, 10.1.2507.10 or later

Affected products

ProductAffected versionsFixed in
splunk splunk9.2.0 ≤ v < 9.2.10, 9.3.0 ≤ v < 9.3.8, 9.4.0 ≤ v < 9.4.6, 10.0.0 ≤ v < 10.0.29.2.10, 9.3.8, 9.4.6, 10.0.2
splunk splunk_cloud_platform9.3.2411 ≤ v < 9.3.2411.120, 10.0.2503 ≤ v < 10.0.2503.8, 10.1.2507 ≤ v < 10.1.2507.109.3.2411.120, 10.0.2503.8, 10.1.2507.10

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CVE-2025-20382 · Splunk · Dark Radar