CVE-2019-1075 Open redirect in ASP.NET Core
An open redirect vulnerability in ASP.NET Core allows attackers to spoof URLs, potentially leading to phishing attacks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2019-1075?
CVE-2019-1075 is a medium-severity vulnerability in Microsoft ASP.NET Core, published on 15 Jul 2019. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A spoofing vulnerability exists in ASP.NET Core that could lead to an open redirect, aka 'ASP.NET Core Spoofing Vulnerability'.
Weakness: CWE-601
Which versions are affected by CVE-2019-1075?
14 open source packages ship an affected version, including Microsoft.AspNetCore.All, Microsoft.AspNetCore.App and Microsoft.AspNetCore.Server.HttpSys. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
Microsoft.AspNetCore.All NuGet | From 2.1.0 | 2.1.12 |
Microsoft.AspNetCore.All NuGet | From 2.1.0 | 2.1.12 |
Microsoft.AspNetCore.All NuGet | From 2.2.0 | 2.2.6 |
Microsoft.AspNetCore.All NuGet | From 2.2.0 | 2.2.6 |
Microsoft.AspNetCore.App NuGet | From 2.1.0 | 2.1.12 |
Microsoft.AspNetCore.App NuGet | From 2.1.0 | 2.1.12 |
8 more packages
Microsoft.AspNetCore.App NuGet | From 2.2.0 | 2.2.6 |
Microsoft.AspNetCore.App NuGet | From 2.2.0 | 2.2.6 |
Microsoft.AspNetCore.Server.HttpSys NuGet | From 2.1.0 | 2.1.12 |
Microsoft.AspNetCore.Server.HttpSys NuGet | From 2.1.0 | 2.1.12 |
Microsoft.AspNetCore.Server.HttpSys NuGet | From 2.2.0 | 2.2.6 |
Microsoft.AspNetCore.Server.HttpSys NuGet | From 2.2.0 | 2.2.6 |
Microsoft.AspNetCore.Server.IIS NuGet | From 2.2.0 | 2.2.6 |
Microsoft.AspNetCore.Server.IIS NuGet | From 2.2.0 | 2.2.6 |
Products include Microsoft Asp.net Core.
How do I fix CVE-2019-1075?
Upgrade Microsoft.AspNetCore.All to a fixed version for your release line: 2.1.12 or 2.2.6.
Is CVE-2019-1075 being exploited?
There is no known exploitation of CVE-2019-1075 in the wild and no public exploit code.
Other vulnerabilities in Microsoft ASP.NET Core
- CVE-2025-55315 ASP.NET Security Feature Bypass Vulnerability
- CVE-2026-88092 ASP.NET Core Tampering Vulnerability
- CVE-2026-40372 ASP.NET Core Elevation of Privilege Vulnerability
- CVE-2021-43877 ASP.NET Core and Visual Studio Elevation of Privilege Vulnerability
- CVE-2020-0603 Remote code execution in ASP.NET Core
Sources
Also known as GHSA-prrf-397v-83xh.