# Moderate severity vulnerability that affects Microsoft.AspNetCore.All, Microsoft.AspNetCore.App, and…

Source: https://junglewise.ai/threats/moderate-severity-vulnerability-that-affects-microsoft-aspnetcore-all-3beef2c2  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2018-10-16  
License: CC BY 4.0 with a link back

Severity: info · Published 2018-10-16

Moderate severity vulnerability that affects Microsoft.AspNetCore.All, Microsoft.AspNetCore.App, and Microsoft.AspNetCore.Server.Kestrel.Core

Technologies: [Microsoft.AspNetCore.All (NuGet)](https://junglewise.ai/threats/technologies/microsoft-aspnetcore-all), [Microsoft.AspNetCore.App (NuGet)](https://junglewise.ai/threats/technologies/microsoft-aspnetcore-app), [Microsoft.AspNetCore.Server.Kestrel.Core (NuGet)](https://junglewise.ai/threats/technologies/microsoft-aspnetcore-server-kestrel-core). Vendors: [NuGet](https://junglewise.ai/threats/vendors/nuget).

## Quick answers

**Is This vulnerability exploited in the wild?** No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.

**How severe is This vulnerability?** Informational severity, published 16 October 2018.

**Which products and versions are affected?** Microsoft.AspNetCore.All (NuGet) ECOSYSTEM:introduced=2.0.0,fixed=2.0.9; Microsoft.AspNetCore.App (NuGet) ECOSYSTEM:introduced=2.1.0,fixed=2.1.2; Microsoft.AspNetCore.Server.Kestrel.Core (NuGet) ECOSYSTEM:introduced=2.0.0,fixed=2.0.4.

**Is there a fix for This vulnerability?** Yes. Microsoft.AspNetCore.All (NuGet): upgrade to 2.0.9 or later; Microsoft.AspNetCore.App (NuGet): upgrade to 2.1.2 or later; Microsoft.AspNetCore.Server.Kestrel.Core (NuGet): upgrade to 2.0.4 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected?** Check whether you run Microsoft.AspNetCore.All (NuGet), Microsoft.AspNetCore.App (NuGet) or Microsoft.AspNetCore.Server.Kestrel.Core (NuGet) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Microsoft.AspNetCore.All (NuGet): upgrade to 2.0.9 or later

  ```sh
  dotnet add package Microsoft.AspNetCore.All --version 2.0.9
  ```

- Microsoft.AspNetCore.App (NuGet): upgrade to 2.1.2 or later

  ```sh
  dotnet add package Microsoft.AspNetCore.App --version 2.1.2
  ```

- Microsoft.AspNetCore.Server.Kestrel.Core (NuGet): upgrade to 2.0.4 or later

  ```sh
  dotnet add package Microsoft.AspNetCore.Server.Kestrel.Core --version 2.0.4
  ```


## Affected products

- Microsoft.AspNetCore.All (NuGet) ECOSYSTEM:introduced=2.0.0,fixed=2.0.9
- Microsoft.AspNetCore.App (NuGet) ECOSYSTEM:introduced=2.1.0,fixed=2.1.2
- Microsoft.AspNetCore.Server.Kestrel.Core (NuGet) ECOSYSTEM:introduced=2.0.0,fixed=2.0.4

## Related threats

- [Microsoft Security Advisory : .NET Security Feature Bypass Vulnerability](https://junglewise.ai/threats/cve-2025-55315-microsoft-security-advisory-net-security-feature-bypass)
- [ASP.NET Core and Visual Studio Denial of Service Vulnerability](https://junglewise.ai/threats/cve-2021-1723-asp-net-core-and-visual-studio-denial-of-service-vulnerability)
- [Cookie parsing failure](https://junglewise.ai/threats/cve-2020-1045-cookie-parsing-failure)
- [ASP.NET Core Denial of Service Vulnerability](https://junglewise.ai/threats/cve-2020-1597-asp-net-core-denial-of-service-vulnerability)
- [Remote code execution in ASP.NET Core](https://junglewise.ai/threats/cve-2020-0603-remote-code-execution-in-asp-net-core)