Associated Vulnerability
Title:Notepad++ 安全漏洞 (CVE-2025-56383)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.
Description
CVE-2025-56383-Proof-of-Concept
Readme
Notepad++ v8.8.3 has a DLL hijacking vulnerability, which can replace the original DLL file to execute malicious code.
The example method is as follows:
(Please note that the following demonstration uses npp.8.8.3.Installer.x64.exe to install Notepad++for testing, but in reality, any installed Notepad++is affected by this vulnerability)
Replace the original DLL (such as Notepad++\plugins\NppExport\NppExport.dll) with a DLL file with the same name containing malicious code (the original export function is forwarded to the original DLL), so that when executing Notepad++. exe, malicious code can be executed.
Among them, original-NppExport.dll is the original DLL, while NppExport.dll is a forged one
Then click notepad++.exe and successfully hijack
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File Snapshot
[4.0K] /data/pocs/9a3a7e8a3458438aff7c9b88829f9661bf62fb12
├── [ 39K] 01.png
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├── [1.1K] poc.c
└── [2.6K] README.md
1 directory, 4 files
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