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High

Open redirect in ASP.NET Core

  • Disclosed: 14.05.2022
  • Updated: 11.10.2026 11:22

ASP.NET Core 2.0 allows an attacker to steal log-in session information such as cookies or authentication tokens via a specially crafted URL aka "ASP.NET Core Elevation Of Privilege Vulnerability".

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
.NET (NuGet) Microsoft.AspNetCore.All >= 2.0.0, < 2.0.3 2.0.3
.NET (NuGet) Microsoft.AspNetCore.Mvc.Core >= 2.0.0, < 2.0.1 2.0.1

References

CVSS score 8.8/10
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE)
CWE-601
Platform
.NET (NuGet)
Package
Microsoft.AspNetCore.All, Microsoft.AspNetCore.Mvc.Core
Disclosed
14.05.2022
Updated
11.10.2026 11:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-3wcj-rg8q-9cqv - CC BY 4.0

Vulnerability history: Microsoft.AspNetCore.Mvc.Core

All published vulnerabilities of this package (.NET (NuGet)), newest first. Shows whether this is a one-off slip or a package that needs watching.

Total entries
6
First → latest
10.2018 05.2022
Without a fix
0
Exploited in attacks
0

Severity breakdown

  • High 4
  • Medium 2

Disclosures per year

  1. Open redirect in ASP.NET Core this entry
    High · 8.8 CVE-2017-11879 >= 2.0.0, < 2.0.1 2.0.1
  2. Cross-origin Resource Sharing bypass in ASP.NET Core
    High · 7.5 CVE-2017-8700 >= 1.0.0, < 1.0.6, >= 1.1.0, < 1.1.6 1.0.6, 1.1.6
  3. Moderate severity vulnerability that affects Microsoft.AspNetCore.Mvc and Microsoft.AspNetCore.Mvc.Core
    Medium CVE-2017-0248 >= 1.0.0, < 1.0.4, >= 1.1.0, < 1.1.3 1.0.4, 1.1.3
  4. ASP.NET Core fails to properly validate web requests
    High · 7.5 CVE-2017-0247 >= 1.0.0, < 1.0.4, >= 1.1.0, < 1.1.3 1.0.4, 1.1.3
  5. Moderate severity vulnerability that affects Microsoft.AspNetCore.Mvc
    Medium · 5.3 CVE-2017-0256 >= 1.0.0, < 1.0.4, >= 1.1.0, < 1.1.3 1.0.4, 1.1.3
  6. High severity vulnerability that affects Microsoft.AspNetCore.Mvc
    High · 7.3 CVE-2017-0249 >= 1.0.0, < 1.0.4, >= 1.1.0, < 1.1.3 1.0.4, 1.1.3

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