WordPress plugins are a great way to extend the functionality of your website. But, plugins also introduce additional vulnerabilities that can be easily exploited by hackers. In this article, I’ll discuss how to tighten up your WordPress plugin security so that it’s less susceptible to attacks.

Escaping Output

When you’re creating a WordPress plugin and displaying data from a database or user input, it’s important to properly escape the data before outputting it. If you don’t do this, then malicious users could inject HTML or JavaScript into your plugin. This would allow them to execute code on your web server, add spam links, or even edit existing content on your website.

To escape data, you will need to use WordPress’ built-in escaping functions, esc_html(), esc_url(), and esc_attr(). The easiest way to determine which function to use is by looking at

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Add the following to your .htaccess file in the root directory of WordPress:

order allow,deny

deny from all

This will block all direct access to PHP files. This is important because most WordPress plugins include PHP files (even the ones that are not intended to be directly accessed by users).