CVE-2025-56383
HIGHNotepad++ 8.8.3 - DLL Hijacking via Uncontrolled Search Path
Title source: llmExploitation Summary
EIP tracks 2 public exploits for CVE-2025-56383. PoCs published by zer0t0, NewComrade12211.
AI-analyzed exploit summary This PoC demonstrates a DLL hijacking vulnerability in Notepad++ v8.8.3 by replacing a legitimate DLL (NppExport.dll) with a malicious one that forwards exports to the original DLL while executing arbitrary code (e.g., a MessageBox).
Description
Notepad++ v8.8.3 has a DLL hijacking vulnerability, which can replace the original DLL file to execute malicious code. NOTE: this is disputed by multiple parties because the behavior only occurs when a user installs the product into a directory tree that allows write access by arbitrary unprivileged users.
Exploits (2)
This PoC demonstrates a DLL hijacking vulnerability in Notepad++ v8.8.3 by replacing a legitimate DLL (NppExport.dll) with a malicious one that forwards exports to the original DLL while executing arbitrary code (e.g., a MessageBox).
This repository contains a functional DLL hijacking exploit for Notepad++ that establishes a reverse shell to a hardcoded IP address. The malicious DLL exports legitimate Notepad++ functions while spawning a reverse shell in a separate thread upon loading.
References (5)
Scores
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H