CVE-2025-55315
ASP.NET Security Feature Bypass Vulnerability
Description
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.
INFO
Published Date :
Oct. 14, 2025, 5:15 p.m.
Last Modified :
Oct. 16, 2025, 2:56 p.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2025-55315
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | f38d906d-7342-40ea-92c1-6c4a2c6478c8 | ||||
| CVSS 3.1 | CRITICAL | [email protected] |
Public PoC/Exploit Available at Github
CVE-2025-55315 has a 3 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-55315.
| URL | Resource |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-55315 | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-55315 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-55315
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Playground to experiment with different behavior on patched/unpatched Kestrel for the CVE-2025-55315 HTTP smuggling vulnerability
None
A variety of tech related news summarized regularly.
custom-elements gpt-4o html machine-learning progressive-web-app pwa web-components news-summarization
HTML Shell JavaScript
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-55315 vulnerability anywhere in the article.
-
The Register
Microsoft kills 9.9-rated ASP.NET Core bug – 'our highest ever' score
Microsoft has patched an ASP.NET Core vulnerability with a CVSS score of 9.9, which security program manager Barry Dorrans said was "our highest ever." The flaw is in the Kestrel web server component ... Read more
-
Hackread - Latest Cybersecurity, Hacking News, Tech, AI & Crypto
Microsoft Patch Tuesday Oct 2025 Fixs 175 Vulnerabilities including 3 Zero-Days
Microsoft Patch Tuesday for October 2025 was massive, delivering over 170 security fixes, making immediate patching mandatory due to the volume and critical nature of the vulnerabilities across Window ... Read more
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Help Net Security
Microsoft patches three zero-days actively exploited by attackers
On October 2025 Patch Tuesday, Microsoft released fixes for 175+ vulnerabilities, including three zero-days under active attack: CVE-2025-24990, CVE-2025-59230, and CVE-2025-47827. The actively exploi ... Read more
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The Hacker News
Two New Windows Zero-Days Exploited in the Wild — One Affects Every Version Ever Shipped
Microsoft on Tuesday released fixes for a whopping 183 security flaws spanning its products, including three vulnerabilities that have come under active exploitation in the wild, as the tech giant off ... Read more
The following table lists the changes that have been made to the
CVE-2025-55315 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Oct. 16, 2025
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:* versions from (including) 17.10.0 up to (excluding) 17.10.20 *cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:* versions from (including) 17.14.0 up to (excluding) 17.14.17 *cpe:2.3:a:microsoft:asp.net_core:*:*:*:*:*:*:*:* versions from (including) 2.3.0 up to (excluding) 2.3.6 *cpe:2.3:a:microsoft:asp.net_core:*:*:*:*:*:*:*:* versions from (including) 8.0.0 up to (excluding) 8.0.21 *cpe:2.3:a:microsoft:asp.net_core:*:*:*:*:*:*:*:* versions from (including) 9.0.0 up to (excluding) 9.0.10 *cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:* versions from (including) 17.12.10 up to (excluding) 17.12.13 Added Reference Type Microsoft Corporation: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-55315 Types: Vendor Advisory -
New CVE Received by [email protected]
Oct. 14, 2025
Action Type Old Value New Value Added Description 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. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L Added CWE CWE-444 Added Reference https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-55315