CVE-2025-43715

Nullsoft Scriptable Install System (NSIS) before 3.11 on Windows allows local users to escalate...

8.1 HighFix available

Nullsoft Scriptable Install System (NSIS) before 3.11 on Windows allows local users to escalate privileges to SYSTEM during an installation, because the temporary plugins directory is created under %WINDIR%\temp and unprivileged users can place a crafted executable file by winning a race condition. This occurs because EW_CREATEDIR does not always set the CreateRestrictedDirectory error flag.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: High
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.33%Up 0.3 points since Apr 17, 2025

What each source reports

CVE List Score used 8.1

Record: CVE-2025-43715
CVSS 3.1: 8.1 HighCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness: CWE-754
Updated: 2026-11-02

EUVDEUVD-2025-11523 8.1

Record: EUVD-2025-11523
CVSS 3.1: 8.1 HighCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-g9m2-7jc6-pmvf 8.1

Nullsoft Scriptable Install System (NSIS) before 3.11 on Windows allows local users to escalate...

Record: GHSA-g9m2-7jc6-pmvf
CVSS 3.1: 8.1 HighCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness: CWE-754
Updated: 2026-11-02

NVD 8.1

Record: CVE-2025-43715
CVSS 3.1: 8.1 HighCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness: CWE-754
Updated: 2026-11-02

OSVDEBIAN-CVE-2025-43715 8.1

Record: DEBIAN-CVE-2025-43715
CVSS 3.1: 8.1 HighCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2025-43715 8.1

Record: UBUNTU-CVE-2025-43715
CVSS 3.1: 8.1 HighCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Updated: 2026-11-02

OSV No score

Record: CVE-2025-43715
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`nsis` Debian:12	All versions, plus listed versions 3.08-33.08-3+deb12u13.09-13.09-23.09-3 Show 5 moreShow less 3.09-43.10-13.10-23.11-13.12-1	None known
`nsis` Debian:13	before 3.11-1	3.11-1
`nsis` Debian:14	before 3.11-1	3.11-1
`nsis` Ubuntu:Pro:14.04:LTS	All versions, plus listed versions 2.46-72.46-7ubuntu0.1~esm1	None known
`nsis` Ubuntu:16.04:LTS	All versions, plus listed versions 2.46-10.12.48-22.50-1	None known
`nsis` Ubuntu:18.04:LTS	All versions, plus listed versions 2.51-1	None known
`nsis` Ubuntu:20.04:LTS	All versions, plus listed versions 3.04-13.04-23.05-13.05-2	None known
`nsis` Ubuntu:22.04:LTS	All versions, plus listed versions 3.06.1-13.08-13.08-2	None known
`nsis` Ubuntu:24.04:LTS	All versions, plus listed versions 3.09-13.09-23.09-33.09-43.09-4ubuntu1	None known
`nsis` Ubuntu:25.10	All versions, plus listed versions 3.10-2ubuntu1	None known
`nsis` Ubuntu:26.10	All versions, plus listed versions 3.10-2ubuntu2	None known
`nsis` Ubuntu:26.04:LTS	All versions, plus listed versions 3.10-2ubuntu13.10-2ubuntu2	None known

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-43715 is a high vulnerability (CVSS 8.1) in Nullsoft Scriptable Install System, published April 17, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.33%, the 25th percentile. Fixed in nsis 3.11-1.