CVE-2025-43715

HIGH

Nullsoft Scriptable Install System < 3.11 - Local Privilege Escalation via Temporary Plugins Directory Race Condition

Title source: llm

Description

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.

References (2)

Core 2

Core References

Various Sources

https://nsis.sourceforge.io/Docs/AppendixF.html#v3.11-rl

Product

https://sourceforge.net/p/nsis/bugs/1315/

Scores

CVSS v3 8.1

EPSS 0.0017

EPSS Percentile 6.1%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact total

Details

CWE

CWE-754

Status published

Products (1)

Nullsoft/Nullsoft Scriptable Install System < 3.11

Published Apr 17, 2025

Tracked Since Feb 18, 2026