CVE-2025-56383

Severity CVSS v4.0:

Pending analysis

Type:

CWE-427 Uncontrolled Search Path Element

Publication date:

26/09/2025

Last modified:

19/11/2025

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.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 8.40 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x

8.40

Severity 3.x

HIGH

References to Advisories, Solutions, and Tools

https://github.com/notepad-plus-plus/notepad-plus-plus
https://github.com/zer0t0/CVE-2025-56383-Proof-of-Concept
https://github.com/zer0t0/CVE-2025-56383-Proof-of-Concept/issues/1
https://www.vicarius.io/vsociety/posts/cve-2025-56383-detect-notepad-vulnerability
https://www.vicarius.io/vsociety/posts/cve-2025-56383-mitigate-notepad-vulnerability