CVE-2024-27303: high-severity vulnerability in electron-userland electron-builder
electron-builder's NSIS installer - execute arbitrary code on the target machine (Windows only)
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.3epss 0.3%
electron-builder is a solution to package and build a ready for distribution Electron, Proton Native app for macOS, Windows and Linux. A vulnerability that only affects eletron-builder prior to 24.13.2 in Windows, the NSIS installer makes a system call to open cmd.exe via NSExec in the `.nsh` installer script. NSExec by default searches the current directory of where the installer is located before searching `PATH`. This means that if an attacker can place a malicious executable file named cmd.exe in the same folder as the installer, the installer will run the malicious file. Version 24.13.2 fixes this issue. No known workaround exists. The code executes at the installer-level before the app is present on the system, so there's no way to check if it exists in a current installer.
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Affected products
electron-userland · electron-builderRelated CVEs — electron-userland electron-builder
In the same product, most dangerous first.
CVE-2024-39698HIGHCode Signing Bypass on Windows in electron-updater < 6.3.0-alpha.6EPSS 0.4%CVE-2026-54673HIGHelectron-updater: Cross-origin redirect leaks `PRIVATE-TOKEN` and mixed-case `Authorization` credentials in `builder-util-runtime`EPSS 0.4%CVE-2026-54672HIGHelectron-updater: Uncontrolled search path elements within `AppImage` built by `app-builder-lib`EPSS 0.2%