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TI-2017-06220 Aliases CVE-2017-8700GHSA-3rp6-rjw4-cq39

ASP.NET Core 1.0, 1.1, and 2.0 allow an attacker to bypass Cross-origin Resource Sharing…

Priority MEDIUM 45Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and GitHub.

Summary

ASP.NET Core 1.0, 1.1, and 2.0 allow an attacker to bypass Cross-origin Resource Sharing (CORS) configurations and retrieve normally restricted content from a web application, aka "ASP.NET Core Information Disclosure Vulnerability".

Why it matters now

EPSS 0.10361 95th percentileScored 2026-11-07
Fix Fixed Microsoft.AspNetCore.Mvc.Core (NuGet): 1.0.6, 1.1.6Microsoft.AspNetCore.Mvc.Cors (NuGet): 1.0.6, 1.1.6

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
MicrosoftASP.NET CoreASP.NET Core 1.0, 1.1, and 2.0—No fix listedCNA
—Microsoft.AspNetCore.Mvc.Core (NuGet)1.0.0 to before 1.0.61.0.6Patch availableGHSA-3rp6-rjw4-cq39
—Microsoft.AspNetCore.Mvc.Core (NuGet)1.1.0 to before 1.1.61.1.6Patch availableGHSA-3rp6-rjw4-cq39
—Microsoft.AspNetCore.Mvc.Cors (NuGet)1.0.0 to before 1.0.61.0.6Patch availableGHSA-3rp6-rjw4-cq39
—Microsoft.AspNetCore.Mvc.Cors (NuGet)1.1.0 to before 1.1.61.1.6Patch availableGHSA-3rp6-rjw4-cq39
  • ASP.NET Core VendorMicrosoft Affected ASP.NET Core 1.0, 1.1, and 2.0 Fixed in — No fix listed CNA
  • Microsoft.AspNetCore.Mvc.Core (NuGet) Vendor— Affected 1.0.0 to before 1.0.6 Fixed in 1.0.6 Patch available GHSA-3rp6-rjw4-cq39
  • Microsoft.AspNetCore.Mvc.Core (NuGet) Vendor— Affected 1.1.0 to before 1.1.6 Fixed in 1.1.6 Patch available GHSA-3rp6-rjw4-cq39
  • Microsoft.AspNetCore.Mvc.Cors (NuGet) Vendor— Affected 1.0.0 to before 1.0.6 Fixed in 1.0.6 Patch available GHSA-3rp6-rjw4-cq39
  • Microsoft.AspNetCore.Mvc.Cors (NuGet) Vendor— Affected 1.1.0 to before 1.1.6 Fixed in 1.1.6 Patch available GHSA-3rp6-rjw4-cq39

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:asp.net_core:1.0:*:*:*:*:*:*:*1.0VulnerableMicrosoft
cpe:2.3:a:microsoft:asp.net_core:1.1:*:*:*:*:*:*:*1.1VulnerableMicrosoft
cpe:2.3:a:microsoft:asp.net_core:2.0:*:*:*:*:*:*:*2.0VulnerableMicrosoft
  • cpe:2.3:a:microsoft:asp.net_core:1.0:*:*:*:*:*:*:* Versions 1.0 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:asp.net_core:1.1:*:*:*:*:*:*:* Versions 1.1 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:asp.net_core:2.0:*:*:*:*:*:*:* Versions 2.0 Vulnerable ·Microsoft

Remediation

  • Fix · GHSA-3rp6-rjw4-cq39 Microsoft.AspNetCore.Mvc.Core (NuGet) Fixed in 1.0.6 Advisory →
  • Fix · GHSA-3rp6-rjw4-cq39 Microsoft.AspNetCore.Mvc.Core (NuGet) Fixed in 1.1.6 Advisory →
  • Fix · GHSA-3rp6-rjw4-cq39 Microsoft.AspNetCore.Mvc.Cors (NuGet) Fixed in 1.0.6 Advisory →
  • Fix · GHSA-3rp6-rjw4-cq39 Microsoft.AspNetCore.Mvc.Cors (NuGet) Fixed in 1.1.6 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Not affected: 3 products
  • .NET Core 1.0 on Red Hat Enterprise Linux
  • .NET Core 1.1 on Red Hat Enterprise Linux
  • .NET Core 2.0 on Red Hat Enterprise Linux

Timeline

  1. 2026-10-02 Threatist record created from CVE-2017-8700
  2. 2026-10-03 Alias added: GHSA-3rp6-rjw4-cq39

References

Patch 1

Advisory 1

Other 2

  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
  • TI-2023-19596 .NET and Visual Studio Denial of Service Vulnerability KEVCVSS 3.1HIGH 7.5
  • TI-2025-34970 ASP.NET Security Feature Bypass Vulnerability CVSS 3.1CRITICAL 9.9
  • TI-2024-14164 .NET Denial of Service Vulnerability CVSS 3.1HIGH 7.5
  • TI-2023-18092 ASP.NET Core Denial of Service Vulnerability CVSS 3.1HIGH 8.2
  • TI-2023-18392 ASP.NET Core Security Feature Bypass Vulnerability CVSS 3.1MEDIUM 6.2
See all 40 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences