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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.
Reserved 2025-04-17 | Published 2025-04-17 | Updated 2025-04-17 | Assigner mitreCWE-754 Improper Check for Unusual or Exceptional Conditions
sourceforge.net/p/nsis/bugs/1315/
nsis.sourceforge.io/Docs/AppendixF.html
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