CVE-2018-0787 — Vulnerability in...

HIGH

ASP.NET Core allow an elevation of privilege

Published October 16, 2018Updated November 8, 2023Source: osv

Summary

ASP.NET Core 1.0. 1.1, and 2.0 allow an elevation of privilege vulnerability due to how web applications that are created from templates validate web requests, aka "ASP.NET Core Elevation Of Privilege Vulnerability".

Advisory Timeline

First published October 16, 2018 (2918 days ago).
Last revised November 8, 2023 — 1848 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

NuGet

Update Microsoft.AspNetCore.Server.Kestrel.Core to 2.0.2 or later

dotnet add package Microsoft.AspNetCore.Server.Kestrel.Core --version 2.0.2

NuGet

Update Microsoft.AspNetCore.HttpOverrides to 2.0.2 or later

dotnet add package Microsoft.AspNetCore.HttpOverrides --version 2.0.2

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (2)

Affects 1 ecosystem: nuget (2).

Package	Ecosystem	Affected	Fixed In
Microsoft.AspNetCore.Server.Kestrel.Core	nuget	2.0.0, 2.0.1	2.0.2
Microsoft.AspNetCore.HttpOverrides	nuget	2.0.0, 2.0.1	2.0.2

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CWE-640
View on MITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 8.8 score means for each attack dimension.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

Frequently Asked Questions

What is CVE-2018-0787?: ASP.NET Core allow an elevation of privilege This vulnerability has been assigned a severity rating of HIGH (CVSS score: 8.8/10).
How do I check if my project is affected by CVE-2018-0787?: CVE-2018-0787 affects Microsoft.AspNetCore.Server.Kestrel.Core and Microsoft.AspNetCore.HttpOverrides. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2018-0787 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score

8.8

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-365p-96qv-xr7g

Related CVEs

CVE-2025-55315
CRITICAL
Microsoft Security Advisory CVE-2025-55315: .NET Security Feature Bypass Vulnerability
CVE-2021-1723
HIGH
ASP.NET Core and Visual Studio Denial of Service Vulnerability
CVE-2019-0564
HIGH
Denial of service in ASP.NET Core
CVE-2026-106112
HIGH
ImageSharp: ICC LUT16 output channel count can write beyond Vector4
CVE-2026-106115
HIGH
ImageSharp: TIFF CCITT T6 encoder writes beyond an undersized output buffer

More NuGet advisories

Check if you're affected

Scan your dependencies to see if this vulnerability affects your projects.

Scan Your Dependencies