CVE-2025-23167
MEDIUMNode.js 20 < 20.19.1 - HTTP Request Smuggling via Improper Header Termination
Title source: llmExploitation Summary
EIP tracks 1 public exploit for CVE-2025-23167. PoCs published by abhisek3122.
AI-analyzed exploit summary This repository contains a Python-based exploit for CVE-2025-23167, a Node.js HTTP request smuggling vulnerability. The exploit crafts a malformed HTTP request to test for improper header termination, potentially bypassing proxy-based access controls.
Description
A flaw in Node.js 20's HTTP parser allows improper termination of HTTP/1 headers using `\r\n\rX` instead of the required `\r\n\r\n`. This inconsistency enables request smuggling, allowing attackers to bypass proxy-based access controls and submit unauthorized requests. The issue was resolved by upgrading `llhttp` to version 9, which enforces correct header termination. Impact: * This vulnerability affects only Node.js 20.x users prior to the `llhttp` v9 upgrade.
Exploits (1)
This repository contains a Python-based exploit for CVE-2025-23167, a Node.js HTTP request smuggling vulnerability. The exploit crafts a malformed HTTP request to test for improper header termination, potentially bypassing proxy-based access controls.
References (1)
Scores
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N