Oct 2025: ASP.NET Security Feature Bypass Vulnerability
CVE-2025-55315 Published on October 14, 2025
ASP.NET Security Feature Bypass Vulnerability
Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core allows an authorized attacker to bypass a security feature over a network.
Weakness Type
What is a HTTP Request Smuggling Vulnerability?
When malformed or abnormal HTTP requests are interpreted by one or more entities in the data flow between the user and the web server, such as a proxy or firewall, they can be interpreted inconsistently, allowing the attacker to "smuggle" a request to one device without the other device being aware of it.
CVE-2025-55315 has been classified to as a HTTP Request Smuggling vulnerability or weakness.
Products Associated with CVE-2025-55315
You can be notified by email with stack.watch whenever vulnerabilities like CVE-2025-55315 are published in these products:
Affected Versions
Microsoft ASP.NET Core 2.3:- Version 2.3 and below 2.3.6 is affected.
- Version 8.0 and below 8.0.21 is affected.
- Version 9.0 and below 9.0.10 is affected.
- Version 17.10.0 and below 17.10.20 is affected.
- Version 17.12.0 and below 17.12.13 is affected.
- Version 17.14.0 and below 17.14.17 is affected.
Vulnerable Packages
The following package name and versions may be associated with CVE-2025-55315
| Package Manager | Vulnerable Package | Versions | Fixed In |
|---|---|---|---|
| nuget | Microsoft.AspNetCore.App.Runtime.win-arm64 | >= 9.0.0, <= 9.0.9 | 9.0.10 |
| nuget | Microsoft.AspNetCore.App.Runtime.win-arm | >= 9.0.0, <= 9.0.9 | 9.0.10 |
| nuget | Microsoft.AspNetCore.App.Runtime.win-x64 | >= 9.0.0, <= 9.0.9 | 9.0.10 |
| nuget | Microsoft.AspNetCore.App.Runtime.win-x86 | >= 9.0.0, <= 9.0.9 | 9.0.10 |
| nuget | Microsoft.AspNetCore.App.Runtime.linux-arm | >= 8.0.0, <= 8.0.20 | 8.0.21 |
| nuget | Microsoft.AspNetCore.App.Runtime.linux-arm64 | >= 8.0.0, <= 8.0.20 | 8.0.21 |
| nuget | Microsoft.AspNetCore.App.Runtime.linux-musl-arm | >= 8.0.0, <= 8.0.20 | 8.0.21 |
| nuget | Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 | >= 8.0.0, <= 8.0.20 | 8.0.21 |
| nuget | Microsoft.AspNetCore.App.Runtime.linux-musl-x64 | >= 8.0.0, <= 8.0.20 | 8.0.21 |
| nuget | Microsoft.AspNetCore.App.Runtime.linux-x64 | >= 8.0.0, <= 8.0.20 | 8.0.21 |
| nuget | Microsoft.AspNetCore.App.Runtime.osx-arm64 | >= 8.0.0, <= 8.0.20 | 8.0.21 |
| nuget | Microsoft.AspNetCore.App.Runtime.osx-x64 | >= 8.0.0, <= 8.0.20 | 8.0.21 |
| nuget | Microsoft.AspNetCore.App.Runtime.win-arm | >= 8.0.0, <= 8.0.20 | 8.0.21 |
| nuget | Microsoft.AspNetCore.App.Runtime.win-arm64 | >= 8.0.0, <= 8.0.20 | 8.0.21 |
| nuget | Microsoft.AspNetCore.App.Runtime.win-x64 | >= 8.0.0, <= 8.0.20 | 8.0.21 |
| nuget | Microsoft.AspNetCore.App.Runtime.win-x86 | >= 8.0.0, <= 8.0.20 | 8.0.21 |
| nuget | Microsoft.AspNetCore.Server.Kestrel.Core | <= 2.3.0 | 2.3.6 |
| nuget | Microsoft.AspNetCore.App.Runtime.linux-arm | = 10.0.0-rc.1.25451.107 | 10.0.0-rc.2.25502.107 |
| nuget | Microsoft.AspNetCore.App.Runtime.win-x64 | = 10.0.0-rc.1.25451.107 | 10.0.0-rc.2.25502.107 |
| nuget | Microsoft.AspNetCore.App.Runtime.linux-musl-arm | = 10.0.0-rc.1.25451.107 | 10.0.0-rc.2.25502.107 |
| nuget | Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 | = 10.0.0-rc.1.25451.107 | 10.0.0-rc.2.25502.107 |
| nuget | Microsoft.AspNetCore.App.Runtime.linux-musl-x64 | = 10.0.0-rc.1.25451.107 | 10.0.0-rc.2.25502.107 |
| nuget | Microsoft.AspNetCore.App.Runtime.linux-x64 | = 10.0.0-rc.1.25451.107 | 10.0.0-rc.2.25502.107 |
| nuget | Microsoft.AspNetCore.App.Runtime.osx-arm64 | = 10.0.0-rc.1.25451.107 | 10.0.0-rc.2.25502.107 |
| nuget | Microsoft.AspNetCore.App.Runtime.osx-x64 | = 10.0.0-rc.1.25451.107 | 10.0.0-rc.2.25502.107 |
| nuget | Microsoft.AspNetCore.App.Runtime.win-arm | = 10.0.0-rc.1.25451.107 | 10.0.0-rc.2.25502.107 |
| nuget | Microsoft.AspNetCore.App.Runtime.win-arm64 | = 10.0.0-rc.1.25451.107 | 10.0.0-rc.2.25502.107 |
| nuget | Microsoft.AspNetCore.App.Runtime.linux-arm64 | = 10.0.0-rc.1.25451.107 | 10.0.0-rc.2.25502.107 |
| nuget | Microsoft.AspNetCore.App.Runtime.win-x86 | = 10.0.0-rc.1.25451.107 | 10.0.0-rc.2.25502.107 |
| nuget | Microsoft.AspNetCore.App.Runtime.linux-arm | >= 9.0.0, <= 9.0.9 | 9.0.10 |
| nuget | Microsoft.AspNetCore.App.Runtime.linux-arm64 | >= 9.0.0, <= 9.0.9 | 9.0.10 |
| nuget | Microsoft.AspNetCore.App.Runtime.linux-musl-arm | >= 9.0.0, <= 9.0.9 | 9.0.10 |
| nuget | Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 | >= 9.0.0, <= 9.0.9 | 9.0.10 |
| nuget | Microsoft.AspNetCore.App.Runtime.linux-musl-x64 | >= 9.0.0, <= 9.0.9 | 9.0.10 |
| nuget | Microsoft.AspNetCore.App.Runtime.linux-x64 | >= 9.0.0, <= 9.0.9 | 9.0.10 |
| nuget | Microsoft.AspNetCore.App.Runtime.osx-arm64 | >= 9.0.0, <= 9.0.9 | 9.0.10 |
| nuget | Microsoft.AspNetCore.App.Runtime.osx-x64 | >= 9.0.0, <= 9.0.9 | 9.0.10 |
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.