TI-2017-08818 Aliases CVE-2017-11879 GHSA-3wcj-rg8q-9cqv

Open redirect in Microsoft ASP.NET Core

MEDIUM 50CWE-601Published 2017-11-15 · Updated 2024-09-16

Key facts

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

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and GitHub. Impact type from CWE-601.

Summary

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".

Why it matters now

EPSS 0.09398 95th percentileScored 2026-11-07

Fix Fixed Microsoft.AspNetCore.All (NuGet): 2.0.3Microsoft.AspNetCore.Mvc.Core (NuGet): 2.0.1

SSVC decision points

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

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Microsoft	ASP.NET Core	ASP.NET Core 2.0	—	No fix listed	CNA
—	Microsoft.AspNetCore.All (NuGet)	2.0.0 to before 2.0.3	2.0.3	Patch available	GHSA-3wcj-rg8q-9cqv
—	Microsoft.AspNetCore.Mvc.Core (NuGet)	2.0.0 to before 2.0.1	2.0.1	Patch available	GHSA-3wcj-rg8q-9cqv

ASP.NET Core VendorMicrosoft Affected ASP.NET Core 2.0 Fixed in — No fix listed CNA
Microsoft.AspNetCore.All (NuGet) Vendor— Affected 2.0.0 to before 2.0.3 Fixed in 2.0.3 Patch available GHSA-3wcj-rg8q-9cqv
Microsoft.AspNetCore.Mvc.Core (NuGet) Vendor— Affected 2.0.0 to before 2.0.1 Fixed in 2.0.1 Patch available GHSA-3wcj-rg8q-9cqv

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:microsoft:asp.net_core:2.0:::::::*	2.0	Vulnerable	Microsoft

cpe:2.3:a:microsoft:asp.net_core:2.0:*:*:*:*:*:*:* Versions 2.0 Vulnerable ·Microsoft

Remediation

Fix · GHSA-3wcj-rg8q-9cqv Microsoft.AspNetCore.All (NuGet) Fixed in 2.0.3 Advisory →
Fix · GHSA-3wcj-rg8q-9cqv Microsoft.AspNetCore.Mvc.Core (NuGet) Fixed in 2.0.1 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2017-11879
2026-10-03 Alias added: GHSA-3wcj-rg8q-9cqv

References

Patch 1

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11879

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2017-11879

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