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WordPress SQL Injection

Previously, SQL Injection was the most basic and widely used hacking technique to gain access to the WordPress database. Nowadays, Cross Site Scripting (XSS) is a more popular method to hack a WordPress site.

What Is sn SQL Injection?

SQL Injection (SQLI) is a code injection technique. Here, the attacker adds Structured Query Language code to a web input box (like a contact form).

SQL is Structured Query Language — the most widely used language for the database in web development. These are the few most popular database engines that use SQL.

Databases Using SQL

  • MySQL
  • MariaDB
  • Postgres SQL
  • MS SQL Server
  • Oracle
  • Access

As should be obvious, MySQL is at the highest priority on the rundown since it serves over 70% of the World Wide Web (WWW) database needs. WordPress that utilizes SQL alone has added to over 29% of WWW and has turned into the most appealing target for aggressors.

Entry Points for SQL Injection Attacks

All information fields are viewed as as targets for SQL Injection attacks. In the Layman’s expression, we can say these are:

  • Sign up forms
  • Login forms
  • Contact forms
  • Site searches
  • Feedback fields
  • Shopping carts

How SQL Injection Works?

This simplicity of SQL Injections has increased its prevalence. The attacker gains access to databases mainly because of a vulnerability in the code used and the aftereffects of sent SQL inquiries. However, we can prevent this by implementing high security to the database.

How to Prevent SQL Injection in WordPress

There is no real way to totally stop of any hacking attempts. Here are the best practices that can anticipate such attacks.

– Scan for SQL Injection Vulnerabilities

You can find many online tools to scan your WordPress site. The following are some popular online tools :

  • WordPress Security Scan – It checks for basic vulnerabilities on your WordPress site.
  • Sucuri SiteCheck – Here your WordPress site can be checked for known malware, blacklisting status, errors and if your site is out-of-date.
  • WPScan – This is a self-hosted vulnerability scanner that is free for personal use.

By running a scan report, you can see exactly which parts need to be focused to improve WordPress security.

The most important for every WordPress user is to keep everything updated including WordPress core, theme and plugins as this will improve your site security.

– WordPress Theme & Plugins

Always use a theme/plugin that updates frequently.

– Use Trusted Form Plugins

A wide range of WordPress sites use Registration Forms, Login Forms, Contact Forms etc… that are vulnerable. Trustworthy plugins are available in the WordPress repo so make sure to use trusted form plugins.

– PHP Versions

PHP has been improved a lot over the last few years. A lot of patches and performance oriented changes have been made. But still, more than 40% of WordPress users are using PHP 5.6 that can be one of the reasons for SQL Injection in WordPress.

– Hide WordPress Version

Do not display the WordPress version publicly. Having this information publicly available can make way easier for the attackers to abuse known vulnerabilities on that particular version.

To hide WordPress version, just add below line of code into the functions.php file of your active theme.

– Change Database Prefix

In WordPress installation by default, the database prefix sets to “wp_”. Most of the WordPress users ignore and just install it with the default settings. Due to which database tables become easier to exploit using SQL Injection techniques.

– Backups

I will advise maintaining a site backup daily as it can help you to recover a hacked site.

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