WordPress Speed Up Service | WordPress Website Maintenance Packages Reply To: How to prevent from nulled theme malicious code?, by Marius L. J. As mentioned, a nulled theme or plugin is a premium solution spread online for free, usually in a way to more rapidly spread bundled malware. Due to the nature of what a nulled product is, we can not support them here on WordPress.org, and encourage you to get a copy from the correct distributor, where you will also get access to support. If you have already installed and ran a nulled theme or plugin, it is recommended that you restore your site from an earlier backup, as there can be no guarantee that content or files have not been tampered with. Reply To: How to prevent from nulled theme malicious code?