CVE-2025-55247 .NET Elevation of Privilege Vulnerability
High 7.3
Published
Updated
Check this codebase for CVE-2025-55247 and fix it if it is affected.
What it is: CVE-2025-55247 is a high-severity path traversal vulnerability in Microsoft .Net, published on 14 Oct 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2025-55247 in the wild and no public exploit code.
Affected packages and fixed versions:
- Microsoft.Build (NuGet): affected from 17.10.0; fixed in 17.10.46
- Microsoft.Build (NuGet): affected from 17.10.0; fixed in 17.10.46
- Microsoft.Build (NuGet): affected from 17.11.0; fixed in 17.11.48
- Microsoft.Build (NuGet): affected from 17.11.0; fixed in 17.11.48
- Microsoft.Build (NuGet): affected from 17.12.0; fixed in 17.12.50
- Microsoft.Build (NuGet): affected from 17.12.0; fixed in 17.12.50
- Microsoft.Build (NuGet): affected from 17.14.0; fixed in 17.14.28
- Microsoft.Build (NuGet): affected from 17.14.0; fixed in 17.14.28
- Microsoft.Build (NuGet): affected from 17.15.0-preview-25277-114; fixed in 18.0.0-preview-25476-107
- Microsoft.Build (NuGet): affected from 17.15.0-preview-25277-114; fixed in 18.0.0-preview-25476-107
- Microsoft.Build (NuGet): affected from 17.8.0; fixed in 17.8.43
- Microsoft.Build (NuGet): affected from 17.8.0; fixed in 17.8.43
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2025-55247/ (Markdown: https://insights.sbomify.com/CVE-2025-55247/index.md)
An authorized local attacker can elevate privileges by exploiting improper link resolution during file access in the .NET runtime.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2025-55247?
CVE-2025-55247 is a high-severity path traversal vulnerability in Microsoft .Net, published on 14 Oct 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Improper link resolution before file access ('link following') in .NET allows an authorized attacker to elevate privileges locally.
Weakness: CWE-59
Which versions are affected by CVE-2025-55247?
38 open source packages ship an affected version, including Microsoft.Build, dotnet and dotnet-sdk. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
Microsoft.Build NuGet | From 17.10.0 | 17.10.46 |
Microsoft.Build NuGet | From 17.10.0 | 17.10.46 |
Microsoft.Build NuGet | From 17.11.0 | 17.11.48 |
Microsoft.Build NuGet | From 17.11.0 | 17.11.48 |
Microsoft.Build NuGet | From 17.12.0 | 17.12.50 |
Microsoft.Build NuGet | From 17.12.0 | 17.12.50 |
32 more packages
Microsoft.Build NuGet | From 17.14.0 | 17.14.28 |
Microsoft.Build NuGet | From 17.14.0 | 17.14.28 |
Microsoft.Build NuGet | From 17.15.0-preview-25277-114 | 18.0.0-preview-25476-107 |
Microsoft.Build NuGet | From 17.15.0-preview-25277-114 | 18.0.0-preview-25476-107 |
Microsoft.Build NuGet | From 17.8.0 | 17.8.43 |
Microsoft.Build NuGet | From 17.8.0 | 17.8.43 |
dotnet Bitnami | From 8.0.0 | 8.0.21, 9.0.10 |
dotnet-sdk Bitnami | From 8.0.0 | 8.0.21, 9.0.10 |
Microsoft.Build.Tasks.Core NuGet | From 17.10.0 | 17.10.46 |
Microsoft.Build.Tasks.Core NuGet | From 17.10.0 | 17.10.46 |
Microsoft.Build.Tasks.Core NuGet | From 17.11.0 | 17.11.48 |
Microsoft.Build.Tasks.Core NuGet | From 17.11.0 | 17.11.48 |
Microsoft.Build.Tasks.Core NuGet | From 17.12.0 | 17.12.50 |
Microsoft.Build.Tasks.Core NuGet | From 17.12.0 | 17.12.50 |
Microsoft.Build.Tasks.Core NuGet | From 17.14.0 | 17.14.28 |
Microsoft.Build.Tasks.Core NuGet | From 17.14.0 | 17.14.28 |
Microsoft.Build.Tasks.Core NuGet | From 17.15.0-preview-25277-114 | 18.0.0-preview-25476-107 |
Microsoft.Build.Tasks.Core NuGet | From 17.15.0-preview-25277-114 | 18.0.0-preview-25476-107 |
Microsoft.Build.Tasks.Core NuGet | From 17.8.0 | 17.8.43 |
Microsoft.Build.Tasks.Core NuGet | From 17.8.0 | 17.8.43 |
Microsoft.Build.Utilities.Core NuGet | From 17.10.0 | 17.10.46 |
Microsoft.Build.Utilities.Core NuGet | From 17.10.0 | 17.10.46 |
Microsoft.Build.Utilities.Core NuGet | From 17.11.0 | 17.11.48 |
Microsoft.Build.Utilities.Core NuGet | From 17.11.0 | 17.11.48 |
Microsoft.Build.Utilities.Core NuGet | From 17.12.0 | 17.12.50 |
Microsoft.Build.Utilities.Core NuGet | From 17.12.0 | 17.12.50 |
Microsoft.Build.Utilities.Core NuGet | From 17.14.0 | 17.14.28 |
Microsoft.Build.Utilities.Core NuGet | From 17.14.0 | 17.14.28 |
Microsoft.Build.Utilities.Core NuGet | From 17.15.0-preview-25277-114 | 18.0.0-preview-25476-107 |
Microsoft.Build.Utilities.Core NuGet | From 17.15.0-preview-25277-114 | 18.0.0-preview-25476-107 |
Microsoft.Build.Utilities.Core NuGet | From 17.8.0 | 17.8.43 |
Microsoft.Build.Utilities.Core NuGet | From 17.8.0 | 17.8.43 |
Products include Microsoft .Net.
How do I fix CVE-2025-55247?
Upgrade Microsoft.Build to a fixed version for your release line: 17.10.46, 17.11.48, 17.12.50 or 17.14.28.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2025-55247 being exploited?
There is no known exploitation of CVE-2025-55247 in the wild and no public exploit code.
Other vulnerabilities in Microsoft .Net
- CVE-2024-43498 .NET and Visual Studio Remote Code Execution Vulnerability
- CVE-2024-0057 NET, .NET Framework, and Visual Studio Security Feature Bypass Vulnerability
- CVE-2026-96957 .NET Security Feature Bypass Vulnerability
- CVE-2026-69439 .NET and Visual Studio Elevation of Privilege Vulnerability
- CVE-2026-71328 .NET and Visual Studio Remote Code Execution Vulnerability
Sources
Also known as BELL-CVE-2025-55247, BIT-dotnet-2025-55247, BIT-dotnet-sdk-2025-55247, GHSA-w3q9-fxm7-j8fq, MINI-477f-p72h-w787, MINI-v524-wp24-xjm7 and 3 more.