SB2023090838 - Multiple vulnerabilities in Notepad++

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Main Vulnerability Database SB2023090838

SB2023090838 - Multiple vulnerabilities in Notepad++

Published: September 8, 2023 Updated: July 14, 2026

Security Bulletin ID SB2023090838
CSH Severity
High
Patch available
YES
Number of vulnerabilities 8
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 25% Low 75%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 8 vulnerabilities.


1) Heap-based buffer overflow (CVE-ID: CVE-2023-40031)

CWE-ID: CWE-122 - Heap-based Buffer Overflow

CVSSv4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the Utf8_16_Read::convert() function in UniConversion.cxx. A remote attacker can trick the victim to open a specially crafted file, trigger a heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


2) Out-of-bounds read (CVE-ID: CVE-2023-40036)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition within the CharDistributionAnalysis::HandleOneChar() function. A remote attacker can create a specially crafted file, trick the victim into opening it, trigger an out-of-bounds read error and read contents of memory on the system.


3) Out-of-bounds read (CVE-ID: CVE-2023-40164)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition within the nsCodingStateMachine::NextStater() function. A remote attacker can create a specially crafted file, trick the victim into opening it, trigger an out-of-bounds read error and read contents of memory on the system.


4) Out-of-bounds read (CVE-ID: CVE-2023-40166)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition within the FileManager::detectLanguageFromTextBegining() function. A remote attacker can create a specially crafted file, trick the victim into opening it, trigger an out-of-bounds read error and read contents of memory on the system.


5) Buffer over-read (CVE-ID: N/A)

CWE-ID: CWE-126 - Buffer over-read

CVSSv4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to out-of-bounds read in CharDistributionAnalysis::HandleOneChar when opening a crafted file. A remote attacker can trick the victim into opening a crafted file to disclose sensitive information.

User interaction is required to open a crafted file.


6) Buffer over-read (CVE-ID: N/A)

CWE-ID: CWE-126 - Buffer over-read

CVSSv4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to an out-of-bounds read in nsCodingStateMachine::NextState when parsing a crafted file during file open. A remote attacker can trick the victim into opening a crafted file to disclose sensitive information.

User interaction is required to open a crafted file.


7) Heap-based buffer overflow (CVE-ID: N/A)

CWE-ID: CWE-122 - Heap-based Buffer Overflow

CVSSv4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to execute arbitrary code.

The vulnerability exists due to heap-based buffer overflow in Utf8_16_Read::convert when opening a crafted file. A remote attacker can trick the victim into opening a crafted file to execute arbitrary code.

User interaction is required to open a crafted file.


8) Buffer over-read (CVE-ID: N/A)

CWE-ID: CWE-126 - Buffer over-read

CVSSv4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to out-of-bounds read in FileManager::detectLanguageFromTextBegining when parsing a crafted file. A remote attacker can trick the victim into opening a crafted file to disclose sensitive information.

User interaction is required to open a crafted file.


Remediation

Install update from vendor's website.

References