Microsoft Security Advisory CVE-2025-24070: .NET Elevation of Privilege Vulnerability

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

7.0 · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H

EPSS

• CVE-2025-24070: 1.01% estimated exploitation activity in the next 30 days; percentile 63.27 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Microsoft Security Advisory CVE-2025-24070: .NET Elevation of Privilege Vulnerability Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in ASP.NET Core 9.0, ASP.NET Core 8.0, ASP.NET Core 6.0, and ASP.NET Core 2.3. This advisory also provides guidance on what developers can do to update their applications to address this vulnerability. A vulnerability exists in ASP.NET Core applications calling RefreshSignInAsync with an improperly authenticated user parameter that could allow an attacker to sign into another user's account, resulting in Elevation of Privilege. Announcement Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/348 Mitigation factors Microsoft has not identified any mitigating factors for this vulnerability. Affected software Any ASP.NET Core 9.0 application running on ASP.NET Core 9.0.2 or earlier. Any ASP.NET Core application running on ASP.NET Core 8.0.13 or earlier. Any…

Published by the source

11 Mar 2025, 19:24 UTC

Last modified by the source

23 Oct 2025, 20:11 UTC

Source last checked

26 Oct 2026, 17:04 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-2865-hh9g-w894

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# Patch Next advisory brief: CVE-2025-24070

Advisory: Microsoft Security Advisory CVE-2025-24070: .NET Elevation of Privilege Vulnerability
IDs: CVE-2025-24070, GHSA-2865-hh9g-w894
Record: https://patchnext.com/advisories/cve-2025-24070 (revision 1, source checked 26 Oct 2026, 17:04 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.0)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Partial vendor fix; fixed versions by package: microsoft.aspnetcore.app.runtime.linux-arm64 9.0.3, 8.0.14; microsoft.aspnetcore.app.runtime.linux-musl-arm64 9.0.3, 8.0.14; microsoft.aspnetcore.identity 2.3.1; microsoft.aspnetcore.app.runtime.osx-x64 9.0.3, 8.0.14; microsoft.aspnetcore.app.runtime.linux-arm 9.0.3, 8.0.14; microsoft.aspnetcore.app.runtime.win-x86 9.0.3, 8.0.14; microsoft.aspnetcore.app.runtime.linux-x64 9.0.3, 8.0.14; microsoft.aspnetcore.app.runtime.linux-musl-arm 9.0.3, 8.0.14; microsoft.aspnetcore.app.runtime.win-arm 9.0.3, 8.0.14; microsoft.aspnetcore.app.runtime.linux-musl-x64 9.0.3, 8.0.14; microsoft.aspnetcore.app.runtime.osx-arm64 9.0.3, 8.0.14; microsoft.aspnetcore.app.runtime.win-x64 9.0.3, 8.0.14; microsoft.aspnetcore.app.runtime.win-arm64 9.0.3, 8.0.14. A vendor fix does not mean a deployment is fixed.

## Affected components
- NuGet microsoft.aspnetcore.app.runtime.linux-arm64: affected >= 9.0.0, <= 9.0.2; >= 8.0.0, <= 8.0.13; >= 6.0.0, <= 6.0.36; fixed in 9.0.3, 8.0.14
- NuGet microsoft.aspnetcore.app.runtime.linux-musl-arm64: affected >= 9.0.0, <= 9.0.2; >= 8.0.0, <= 8.0.13; >= 6.0.0, <= 6.0.36; fixed in 9.0.3, 8.0.14
- NuGet microsoft.aspnetcore.identity: affected >= 2.3.0, <= 2.3.0; fixed in 2.3.1
- NuGet microsoft.aspnetcore.app.runtime.osx-x64: affected >= 9.0.0, <= 9.0.2; >= 8.0.0, <= 8.0.13; >= 6.0.0, <= 6.0.36; fixed in 9.0.3, 8.0.14
- NuGet microsoft.aspnetcore.app.runtime.linux-arm: affected >= 9.0.0, <= 9.0.2; >= 8.0.0, <= 8.0.13; >= 6.0.0, <= 6.0.36; fixed in 9.0.3, 8.0.14
- NuGet microsoft.aspnetcore.app.runtime.win-x86: affected >= 8.0.0, <= 8.0.13; >= 9.0.0, <= 9.0.2; >= 6.0.0, <= 6.0.36; fixed in 9.0.3, 8.0.14
- NuGet microsoft.aspnetcore.app.runtime.linux-x64: affected >= 9.0.0, <= 9.0.2; >= 8.0.0, <= 8.0.13; >= 6.0.0, <= 6.0.36; fixed in 9.0.3, 8.0.14
- NuGet microsoft.aspnetcore.app.runtime.linux-musl-arm: affected >= 9.0.0, <= 9.0.2; >= 8.0.0, <= 8.0.13; >= 6.0.0, <= 6.0.36; fixed in 9.0.3, 8.0.14
- NuGet microsoft.aspnetcore.app.runtime.win-arm: affected >= 8.0.0, <= 8.0.13; >= 9.0.0, <= 9.0.2; >= 6.0.0, <= 6.0.36; fixed in 9.0.3, 8.0.14
- NuGet microsoft.aspnetcore.app.runtime.linux-musl-x64: affected >= 9.0.0, <= 9.0.2; >= 8.0.0, <= 8.0.13; >= 6.0.0, <= 6.0.36; fixed in 9.0.3, 8.0.14
- NuGet microsoft.aspnetcore.app.runtime.osx-arm64: affected >= 9.0.0, <= 9.0.2; >= 8.0.0, <= 8.0.13; >= 6.0.0, <= 6.0.36; fixed in 9.0.3, 8.0.14
- NuGet microsoft.aspnetcore.app.runtime.win-x64: affected >= 9.0.0, <= 9.0.2; >= 8.0.0, <= 8.0.13; >= 6.0.0, <= 6.0.36; fixed in 9.0.3, 8.0.14
- NuGet microsoft.aspnetcore.app.runtime.win-arm64: affected >= 9.0.0, <= 9.0.2; >= 8.0.0, <= 8.0.13; >= 6.0.0, <= 6.0.36; fixed in 9.0.3, 8.0.14

## Suggested inspection (read-only)
- NuGet microsoft.aspnetcore.app.runtime.linux-arm64: check the installed version with your package manager.
- NuGet microsoft.aspnetcore.app.runtime.linux-musl-arm64: check the installed version with your package manager.
- NuGet microsoft.aspnetcore.identity: check the installed version with your package manager.
- NuGet microsoft.aspnetcore.app.runtime.osx-x64: check the installed version with your package manager.
- NuGet microsoft.aspnetcore.app.runtime.linux-arm: check the installed version with your package manager.
- NuGet microsoft.aspnetcore.app.runtime.win-x86: check the installed version with your package manager.
- NuGet microsoft.aspnetcore.app.runtime.linux-x64: check the installed version with your package manager.
- NuGet microsoft.aspnetcore.app.runtime.linux-musl-arm: check the installed version with your package manager.
- NuGet microsoft.aspnetcore.app.runtime.win-arm: check the installed version with your package manager.
- NuGet microsoft.aspnetcore.app.runtime.linux-musl-x64: check the installed version with your package manager.
- NuGet microsoft.aspnetcore.app.runtime.osx-arm64: check the installed version with your package manager.
- NuGet microsoft.aspnetcore.app.runtime.win-x64: check the installed version with your package manager.
- NuGet microsoft.aspnetcore.app.runtime.win-arm64: check the installed version with your package manager.

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on microsoft.aspnetcore.app.runtime.linux-arm64, microsoft.aspnetcore.app.runtime.linux-musl-arm64, microsoft.aspnetcore.identity, microsoft.aspnetcore.app.runtime.osx-x64, microsoft.aspnetcore.app.runtime.linux-arm, microsoft.aspnetcore.app.runtime.win-x86, microsoft.aspnetcore.app.runtime.linux-x64, microsoft.aspnetcore.app.runtime.linux-musl-arm, microsoft.aspnetcore.app.runtime.win-arm, microsoft.aspnetcore.app.runtime.linux-musl-x64, microsoft.aspnetcore.app.runtime.osx-arm64, microsoft.aspnetcore.app.runtime.win-x64, microsoft.aspnetcore.app.runtime.win-arm64.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-2865-hh9g-w894 (GitHub-reviewed advisory GHSA-2865-hh9g-w894 lists affected ranges: NuGet microsoft.aspnetcore.identity >=2.3.0 =9.0.0 =8.0.0 =6.0.0 =9.0.0 =8.0.0 =6.0.0 =9.0.0 =8.0.0 =6.0.0 =9.0.0…)

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