Notepad++ Input Validation Flaw Leads Search Path Vulnerability

Notepad++ Input Validation Flaw Leads Search Path Vulnerability

Last Updated: December 1, 2023By

Notepad++ Input Validation Flaws Leads to uncontrolled Search Path Vulnerability

Notepad++ has been discovered with an uncontrolled search path vulnerability, which could allow threat actors to search an untrusted search path. This vulnerability has been disclosed to Notepad++, and a patch has yet to be provided.

Notepad++ is a simple text editor for Windows with many more capabilities and can be used to open or edit code files written in other programming languages. Multiple vulnerabilities in Notepad++ were previously reported in August 2023.

CVE-2023-6401: Uncontrolled Search Path in Notepad++

This vulnerability exists in an unknown functionality of the file dbghelp.exe, which a threat actor can manipulate to search an untrusted path.

This vulnerability has been categorized under “Hijack Execution Flow” by the MITRE framework. 


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Notepad++ utilizes a predetermined search path to locate its resources. However, this search path can be exploited by threat actors to compromise the Confidentiality, Integrity, and Availability (CIA) triad of the system.

Attackers can target one or more locations in the specified path and gain unauthorized access to the resources.

Products affected by this vulnerability include Notepad++ versions before 8.1.

Notepad++ is yet to publish a fix and a security advisory for this report.

There has been no evidence of exploitation of this vulnerability by threat actors. The severity for this vulnerability has been given as 5.3 (Medium) by VulDB. 

No other additional information about this vulnerability has been reported, nor has a publicly available exploit been found.

To know more about this vulnerability, VulDB has published a report providing additional information.

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