External Control of File Name or Path Affecting servicestack package, versions [,8.6.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DOTNET-SERVICESTACK-10500473
- published25 Jun 2025
- disclosed25 Jun 2025
- creditPiotr Bazydlo
Introduced: 25 Jun 2025
CVE-2025-6444 (opens in a new tab)How to fix?
Upgrade ServiceStack to version 8.6.0 or higher.
Overview
ServiceStack is a simple and fast alternative to WCF, MVC and Web API in one cohesive framework for all your services and web apps.
Affected versions of this package are vulnerable to External Control of File Name or Path in the url parameter to the GetErrorResponse method. An attacker can relay NTLM credentials in the context of the current user by supplying a URI with the file:// scheme.
Note: The package's developers point out that the security impact of this method's ability to access local file paths is minimal because such access is exposed by the native .Net WebRequest.Create(url) that this package provides a wrapper for. So no greater risk is introduced by the wrapper function.