8.2
HIGH CVSS 4.0
CVE-2025-55163
Netty HTTP/2 MadeYouReset DDoS Vulnerability
Description

Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.124.Final and 4.2.4.Final, Netty is vulnerable to MadeYouReset DDoS. This is a logical vulnerability in the HTTP/2 protocol, that uses malformed HTTP/2 control frames in order to break the max concurrent streams limit - which results in resource exhaustion and distributed denial of service. This issue has been patched in versions 4.1.124.Final and 4.2.4.Final.

INFO

Published Date :

Aug. 13, 2025, 3:15 p.m.

Last Modified :

Aug. 13, 2025, 5:33 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Affected Products

The following products are affected by CVE-2025-55163 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.

ID Vendor Product Action
1 Netty netty
: Total Affected Vendor : 1 | Products : 1
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 4.0 HIGH [email protected]
Public PoC/Exploit Available at Github

CVE-2025-55163 has a 2 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-2025-55163.

URL Resource
https://github.com/netty/netty/security/advisories/GHSA-prj3-ccx8-p6x4
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-55163 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-2025-55163 weaknesses.

CAPEC-125: Flooding Flooding CAPEC-130: Excessive Allocation Excessive Allocation CAPEC-147: XML Ping of the Death XML Ping of the Death CAPEC-197: Exponential Data Expansion Exponential Data Expansion CAPEC-229: Serialized Data Parameter Blowup Serialized Data Parameter Blowup CAPEC-230: Serialized Data with Nested Payloads Serialized Data with Nested Payloads CAPEC-231: Oversized Serialized Data Payloads Oversized Serialized Data Payloads CAPEC-469: HTTP DoS HTTP DoS CAPEC-482: TCP Flood TCP Flood CAPEC-486: UDP Flood UDP Flood CAPEC-487: ICMP Flood ICMP Flood CAPEC-488: HTTP Flood HTTP Flood CAPEC-489: SSL Flood SSL Flood CAPEC-490: Amplification Amplification CAPEC-491: Quadratic Data Expansion Quadratic Data Expansion CAPEC-493: SOAP Array Blowup SOAP Array Blowup CAPEC-494: TCP Fragmentation TCP Fragmentation CAPEC-495: UDP Fragmentation UDP Fragmentation CAPEC-496: ICMP Fragmentation ICMP Fragmentation CAPEC-528: XML Flood XML Flood

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).

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ARPSyndicate/cve-scores

EPSS & VEDAS Score Aggregator for CVEs

cve vulnerability exploit epss vedas exploit-maturity

Updated: 1 day, 5 hours ago
250 stars 35 fork 35 watcher
Born at : April 13, 2021, 4:50 a.m. This repo has been linked 150 different CVEs too.
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th2-net/th2-bom

None

Dockerfile

Updated: 17 hours, 21 minutes ago
1 stars 4 fork 4 watcher
Born at : Nov. 7, 2020, 1:05 p.m. This repo has been linked 4 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-55163 vulnerability anywhere in the article.

  • The Cyber Express
New HTTP/2 DoS Vulnerability Prompts Vendor and Project Fixes

A new HTTP/2 denial of service (DoS) vulnerability that circumvents mitigations put in place after 2023’s “Rapid Reset” vulnerability is largely being addressed by affected vendors and projects, thank ... Read more

Published Date: Aug 18, 2025 (4 days, 3 hours ago)
  • SentinelOne
The Good, the Bad and the Ugly in Cybersecurity – Week 33

The Good | DoJ Charges $100M Fraud Ring & Seizes $1M in Crypto from BlackSuit Ransomware The DoJ has charged four Ghanaian nationals, Isaac Oduro Boateng (aka “Kofi Boat”), Inusah Ahmed (aka “Pascal”) ... Read more

Published Date: Aug 15, 2025 (1 week ago)
  • SentinelOne
The Good, the Bad and the Ugly in Cybersecurity – Week 33

The Good | DoJ Charges $100M Fraud Ring & Seizes $1M in Crypto from BlackSuit Ransomware The DoJ has charged four Ghanaian nationals, Isaac Oduro Boateng (aka “Kofi Boat”), Inusah Ahmed (aka “Pascal”) ... Read more

Published Date: Aug 15, 2025 (1 week ago)
  • CybersecurityNews
New HTTP/2 MadeYouReset Vulnerability Enables Large-Scale DDoS Attacks

Security researchers have identified a new denial-of-service (DoS) vulnerability in HTTP/2 implementations, referred to as MadeYouReset (CVE-2025-8671). This discovery represents a notable escalation ... Read more

Published Date: Aug 15, 2025 (1 week ago)
  • The Hacker News
New HTTP/2 'MadeYouReset' Vulnerability Enables Large-Scale DoS Attacks

Aug 14, 2025Ravie LakshmananServer Security / Vulnerability Multiple HTTP/2 implementations have been found susceptible to a new attack technique called MadeYouReset that could be explored to conduc ... Read more

Published Date: Aug 14, 2025 (1 week, 1 day ago)

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2025-55163 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.

  • New CVE Received by [email protected]

    Aug. 13, 2025

    Action Type Old Value New Value
    Added Description Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.124.Final and 4.2.4.Final, Netty is vulnerable to MadeYouReset DDoS. This is a logical vulnerability in the HTTP/2 protocol, that uses malformed HTTP/2 control frames in order to break the max concurrent streams limit - which results in resource exhaustion and distributed denial of service. This issue has been patched in versions 4.1.124.Final and 4.2.4.Final.
    Added CVSS V4.0 AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
    Added CWE CWE-770
    Added Reference https://github.com/netty/netty/security/advisories/GHSA-prj3-ccx8-p6x4
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 8.2
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability