The pure-folder-three npm package in versions 0.5.0 through 0.7.3 includes a postinstall script and import-time code that decode an obfuscated URL and dynamically require the https module. It makes an HTTPS request to a remote server and executes the content of the response header 'm' via child_process.execSync, enabling remote arbitrary command execution. The malicious code is gated by a username check to exclude the author's own machine. Because the malicious code runs both on install and on import, ignoring npm install scripts does not prevent exploitation. This results in a fully compromised system where all stored secrets and keys are at risk.

Any system that installs or imports the affected pure-folder-three package versions is subject to arbitrary remote code execution by an attacker-controlled server. This leads to full system compromise, including potential theft or destruction of secrets, keys, and other sensitive data. The attacker gains complete control over the compromised host.

No official patch or remediation is currently available. Users should immediately remove all affected versions of the pure-folder-three package (0.5.0, 0.6.0, 0.7.0, 0.7.1, 0.7.3) from their systems. Because the package grants full control to an external attacker, all secrets and keys stored on the compromised systems should be rotated from a separate, trusted environment. Monitor for any signs of compromise and consider rebuilding affected systems to ensure removal of all malicious artifacts.