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Vulnerability · Published Apr 17, 2025 · Assigned by mitre

CVE-2025-43715

High 8.1

In plain English

A high-severity security flaw in Nullsoft Scriptable Install System from Nullsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.1High
Exploit odds (30 days)0.3%top 74.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12nsisno fix listedDEBIAN-CVE-2025-43715
Debian:13nsis3.11-1DEBIAN-CVE-2025-43715
Debian:14nsis3.11-1DEBIAN-CVE-2025-43715
Ubuntu:22.04:LTSnsisno fix listedUBUNTU-CVE-2025-43715
Ubuntu:24.04:LTSnsisno fix listedUBUNTU-CVE-2025-43715
Ubuntu:25.10nsisno fix listedUBUNTU-CVE-2025-43715
Ubuntu:26.04:LTSnsisno fix listedUBUNTU-CVE-2025-43715
Ubuntu:26.10nsisno fix listedUBUNTU-CVE-2025-43715

Affected products (as reported)

VendorProductVersions
Nullsoft Nullsoft Scriptable Install System 0 – before 3.11

Weakness: CWE-754 · Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

References