DotVVM allows path traversal when deployed in Debug mode
Description
There is a path traversal vulnerability in any DotVVM application started in Debug mode, if at least one resource with the FileResourceLocation has been added. The vulnerability allows an attacker to read arbitrary files from the filesystem accessible by the web application (i.e. appsettings.json or other files containing secrets).
Patches
The bug is patched in versions 4.2.10, 4.3.8 and 5.0.0-preview03-final (and newer).
Apart from updating DotVVM, it is also recommend invalidating any secrets which could have been leaked by an application deployed in Debug mode (such as database passwords).
Workarounds
If you cannot update to a patched version, avoid running a publicly accessible DotVVM application in Debug mode (Development environment in Asp.Net Core). It is recommend adding the following statement to the DotvvmStartup class:
config.Debug = false; // TODO: workaround for GHSA-6q65-j4jw-9cg8, remove after updating DotVVMAffected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| .NET (NuGet) | DotVVM | >= 4.3.0-preview01-final, < 4.3.8, >= 5.0.0-preview01-final, < 5.0.0-preview03-final, < 4.2.10 | 4.3.8, 5.0.0-preview03-final, 4.2.10 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N- Weakness (CWE)
CWE-22- Platform
- .NET (NuGet)
- Package
DotVVM- Disclosed
- 19.06.2025
- Updated
- 11.10.2026 11:23
Sources and licenses
OSV / GitHub Advisory Database - GHSA-6q65-j4jw-9cg8 - CC BY 4.0
Vulnerability history: DotVVM
All published vulnerabilities of this package (.NET (NuGet)), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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