Splunk <10.0.2 Unvalidated Redirect via data:image/png URL
CVE-2025-20382 Published on December 3, 2025
URL validation bypass through Views Dashboard in Splunk Enterprise
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.
Weakness Type
What is an Open Redirect Vulnerability?
A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks. An http parameter may contain a URL value and could cause the web application to redirect the request to the specified URL. By modifying the URL value to a malicious site, an attacker may successfully launch a phishing scam and steal user credentials. Because the server name in the modified link is identical to the original site, phishing attempts have a more trustworthy appearance.
CVE-2025-20382 has been classified to as an Open Redirect vulnerability or weakness.
Products Associated with CVE-2025-20382
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Affected Versions
Splunk Enterprise:- Version 10.0 and below 10.0.2 is affected.
- Version 9.4 and below 9.4.6 is affected.
- Version 9.3 and below 9.3.8 is affected.
- Version 9.2 and below 9.2.10 is affected.
- Version 10.1.2507 and below 10.1.2507.10 is affected.
- Version 10.0.2503 and below 10.0.2503.8 is affected.
- Version 9.3.2411 and below 9.3.2411.120 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.