GHSA-q8g5-rw97-f55h: Duplicate Advisory Denial of Service Vulnerability

HIGH
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CVSS 7.3
CWE-59
Published
Advisory Summary

GHSA-q8g5-rw97-f55h is a HIGH (CVSS 7.3) denial of service vulnerability (CWE-59: Improper Link Resolution Before File Access ('Link Following')) affecting Duplicate Advisory libraries in the NuGet ecosystem. The issue involves microsoft security advisory cve-2025-55247 | .net denial of service vulnerability. Remediation is available by upgrading affected packages to version 18.0.0-preview-25476-107.

GHSA-q8g5-rw97-f55h at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-q8g5-rw97-f55h
Severity HIGH
CVSS v3.1 Base Score 7.3
CWE Classification CWE-59: Improper Link Resolution Before File Access ('Link Following')
Affected Product Duplicate Advisory
Package Ecosystem NuGet
Published Date
Last Updated

Security Impact

CVSS: 7.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H).

Attack Vector Local (AV:L)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction Required (UI:R)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix GHSA-q8g5-rw97-f55h

To remediate this vulnerability, upgrade all affected Duplicate Advisory dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Microsoft.Build.Tasks.Core fixed: 18.0.0-preview-25476-107 
Upgrade Microsoft.Build.Tasks.Core to 18.0.0-preview-25476-107
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for Microsoft.Build.Tasks.Core

How to Check if You Are Affected

To determine whether your application is affected by GHSA-q8g5-rw97-f55h, inspect your project dependencies for Duplicate Advisory:

inspect dependencies for Microsoft.Build.Tasks.Core

Analyze the terminal output to locate any version of Duplicate Advisory in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 18.0.0-preview-25476-107), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-59: Improper Link Resolution Before File Access ('Link Following'), where the product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource. In Duplicate Advisory, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-w3q9-fxm7-j8fq. This link is maintained to preserve external references. ### Original Description Improper link resolution before file access ('link following') in .NET allows an authorized attacker to elevate privileges locally.

GHSA-q8g5-rw97-f55h Affected Duplicate Advisory Versions

1 component(s)
Fixed Versions:
18.0.0-preview-25476-107
Product / Package Ecosystem Affected Versions Fixed Version
Microsoft.Build.Tasks.Core
nuget/Microsoft.Build.Tasks.Core
NuGet
≥ 17.15.0-preview-25277-114
< 18.0.0-preview-25476-107
All 1 versions
17.15.0-preview-25277-114
18.0.0-preview-25476-107

References

NVD — GHSA-q8g5-rw97-f55h NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-55247
msrc.microsoft.com/update-guide/vulner... WEB
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-55247

Frequently Asked Questions

What is GHSA-q8g5-rw97-f55h?
GHSA-q8g5-rw97-f55h is a security vulnerability in Duplicate Advisory involving Microsoft Security Advisory CVE-2025-55247 | .NET Denial of Service Vulnerability under CWE-59: Improper Link Resolution Before File Access ('Link Following').
Which Duplicate Advisory versions are affected?
Affected versions include releases prior to 18.0.0-preview-25476-107 across affected packages: Microsoft.Build.Tasks.Core.
What version fixes GHSA-q8g5-rw97-f55h?
Upgrading to 18.0.0-preview-25476-107 (or the latest patched release for your respective branch) resolves the vulnerability.
Is Microsoft.Build.Tasks.Core affected?
Yes, Microsoft.Build.Tasks.Core is affected in releases prior to 18.0.0-preview-25476-107. Upgrade your dependency to 18.0.0-preview-25476-107 or later.
What is the CVSS score of GHSA-q8g5-rw97-f55h?
GHSA-q8g5-rw97-f55h has a CVSS v3.1 base score of 7.3 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H.
What CWE is associated with GHSA-q8g5-rw97-f55h?
GHSA-q8g5-rw97-f55h is classified under CWE-59: Improper Link Resolution Before File Access ('Link Following') (The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.).
How can I check NuGet dependencies for GHSA-q8g5-rw97-f55h?
Run the dependency tree command: 'inspect dependencies for Microsoft.Build.Tasks.Core'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-q8g5-rw97-f55h",
  "modified" : "2025-10-15T17:28:01Z",
  "published" : "2025-10-14T18:30:30Z",
  "withdrawn" : "2025-10-15T17:28:01Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: Microsoft Security Advisory CVE-2025-55247 | .NET Denial of Service Vulnerability",
  "details" : "### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-w3q9-fxm7-j8fq. This link is maintained to preserve external references.\n\n### Original Description\nImproper link resolution before file access ('link following') in .NET allows an authorized attacker to elevate privileges locally.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Microsoft.Build.Tasks.Core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "17.15.0-preview-25277-114"
      }, {
        "fixed" : "18.0.0-preview-25476-107"
      } ]
    } ],
    "versions" : [ "17.15.0-preview-25277-114" ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-55247"
  }, {
    "type" : "WEB",
    "url" : "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-55247"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-59" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-10-15T17:28:01Z",
    "nvd_published_at" : "2025-10-14T17:15:44Z"
  }
}