WordPress Security: Goodbye XML-RPC

Introduction: A Legacy Feature Now a Security Liability

For years, XML-RPC has served as a bridge for WordPress communication, enabling remote access and publishing capabilities. But in 2025, its role has drastically shifted — from a useful integration tool to a major security vulnerability. If you’re still relying on XML-RPC, it’s time to reconsider.

This article dives deep into why and how to disable XML-RPC in WordPress to bolster your site’s defense, especially against brute force and DDoS attacks. We’ll explore how it stacks up against the REST API, global trends in security breaches, and practical hardening tips.

What Is XML-RPC in WordPress and Why Is It a Security Risk?

XML-RPC stands for XML Remote Procedure Call. It was introduced in WordPress to allow for remote publishing, pingbacks, and integration with external services like mobile apps.

But here’s the catch: this very capability makes it a high-risk entry point for cyber threats. Attackers can exploit it to:

• Execute brute force attacks by batching multiple login attempts in a single request.
• Trigger pingback-related DDoS attacks, redirecting traffic to targeted sites.
• Bypass traditional security plugins that filter out repeated login attempts.

Snippet Answer (AEO Optimized)

What is XML-RPC in WordPress and why is it a security risk? XML-RPC allows remote commands in WordPress but is now exploited for brute force and DDoS attacks. It opens your site to high-volume threats, making it a security liability.

Global XML-RPC Exploits: A Threat You Can’t Ignore

Recent cybersecurity reports reveal that XML-RPC endpoints are one of the top 10 most attacked surfaces in WordPress installations globally. In 2024 alone, XML-RPC-based attacks accounted for:

• Over 17% of WordPress brute force incidents
• DDoS attack traffic increases up to 1.2 Tbps through pingback amplification

While REST API usage has grown, millions of legacy plugins and themes still rely on XML-RPC, creating a complex security landscape.

How to Disable XML-RPC in WordPress (Safely)

There are several safe and effective ways to disable XML-RPC without compromising core functionality:

1. Disable via Plugin

• Use plugins like “Disable XML-RPC” or “Stop XML-RPC Attack”.
• Ideal for non-technical users.

  2. Disable via .htaccess

<Files xmlrpc.php>
Order Deny,Allow
Deny from all
</Files>

• Lightweight and fast.
• May conflict with some plugin-based services.

3. Disable via WordPress Theme functions.php

add_filter(‘xmlrpc_enabled’, ‘__return_false’);

• Minimal intrusion.
• Doesn’t remove the file but disables functionality.

4. Disable via Server Configuration

• On NGINX:

location = /xmlrpc.php {
deny all;
access_log off;
log_not_found off;
}

• Offers maximum control, suitable for managed hosting environments.

 Tip: Always back up your site before making configuration changes.

XML-RPC vs REST API: Which One to Use in 2025?

Verdict: For modern WordPress setups, the REST API is more secure, scalable, and developer-friendly.

WordPress Security Best Practices (Beyond XML-RPC)

Disabling XML-RPC is just the beginning. Strengthen your WordPress security posture with these practices:

• Use strong passwords and 2FA for all admin accounts
• Install a reputable firewall plugin (e.g., Wordfence, Sucuri)
• Restrict login attempts with plugins or server-side settings
• Keep WordPress core, plugins, and themes updated
• Use HTTPS and SSL certificates
• Limit user roles and permissions strictly

FAQ: XML-RPC and WordPress Security

Q1: What is XML-RPC in WordPress and why is it a security risk?

A: XML-RPC allows external apps to communicate with WordPress but is now abused for large-scale login and pingback attacks, posing a serious threat.

Q2: How can I safely disable XML-RPC without affecting site functionality?

A: Use a plugin or theme function to disable it. REST API now replaces most XML-RPC functions, making it safe to remove for most users.

Q3: Is disabling XML-RPC necessary if I already use REST API?

A: Yes. XML-RPC remains active unless manually disabled. It’s still targeted even if unused.

Q4: Will disabling XML-RPC break any plugins?

A: Some outdated plugins or remote publishing tools may stop working. Test changes in staging before deploying live.

Q5: Is REST API secure?

A: Yes. REST API supports secure authentication methods like OAuth, making it safer than XML-RPC.

Conclusion

XML-RPC had its moment, but in today’s threat landscape, it’s an open door for hackers. Disabling it is a critical step in hardening your WordPress site. Combine it with other best practices to build a security-first infrastructure.

Secure your WordPress site today—disable XML-RPC and follow our expert hardening checklist to stay protected.