The npm package react-wp-viewer versions 0.2.4, 0.2.15, and 0.2.99 is a dependency-confusion malicious package. Its postinstall script makes an HTTP request to an attacker-controlled IP, leaking environment details such as the installer's IP and hostname. This behavior indicates it is squatting on an internal package name to gather reconnaissance data. The package may lead to full system compromise, and any secrets on affected systems should be rotated immediately.