The Biggest Security Risks for WordPress Websites
Outdated Plugins and Themes
By far the greatest security risk for WordPress is outdated plugins. The average WordPress site has 20 to 30 plugins installed, and each one represents a potential attack surface. When a known vulnerability in a plugin is published, automated attack waves begin within hours. Websites that do not apply the update promptly are systematically compromised. The Patchstack report shows that 33% of all WordPress vulnerabilities reported in 2025 had no patch at the time of disclosure, meaning the website could not be protected at all (Patchstack State of WordPress Security).
XICTRAQ monitors your WordPress website from outside and detects the consequences of outdated software: when a compromised plugin injects malware, the HTML output of the website changes. The screenshot changelog makes such changes visible. When a hacked plugin inserts redirects, uptime monitoring detects the unexpected HTTP status code. And when the website ends up on a blacklist, the security monitoring captures it.
Brute-Force Attacks on wp-login.php
WordPress's default login URL (/wp-login.php) is universally known and permanently under attack from bots. Automated tools systematically test common usernames (admin, administrator, the domain name) with common passwords. According to Wordfence, WordPress sites are hit by brute-force attacks an average of 2,800 times per day (Wordfence Annual Security Report). Successful brute-force attacks give the attacker full access to the WordPress backend, from where they can install plugins, modify code, and steal customer data.
Countermeasures: use strong, unique passwords with at least 16 characters. Enable two-factor authentication (2FA) for all admin accounts. Limit login attempts to a maximum of 5 per IP address. Consider changing the login URL or restricting access via .htaccess to specific IP addresses. XICTRAQ can monitor the reachability of your login page and alert when it suddenly becomes unreachable, which may indicate a successful attack or a server-side lockout.
Missing Security Headers
WordPress does not set any of the recommended security headers by default. Neither Content-Security-Policy, Strict-Transport-Security, X-Content-Type-Options, nor X-Frame-Options are set automatically. This makes WordPress websites vulnerable to cross-site scripting (XSS), clickjacking, and MIME-type sniffing. Compounding the issue, many plugins load their own JavaScript and CSS files, making the implementation of a strict Content-Security-Policy challenging.
XICTRAQ automatically checks the existing security headers with every check and evaluates their configuration. The security scan identifies missing headers and provides specific implementation recommendations. For WordPress, security headers are most reliably set through server configuration (Apache .htaccess or nginx conf), not through PHP plugins, as these do not take effect during a PHP error.
External Monitoring: Why Not Just Another Plugin?
The obvious question: why an external monitoring tool instead of another WordPress plugin? The answer has both technical and practical reasons. First: every additional plugin is an additional attack surface. Security plugins in particular require extensive permissions that are especially dangerous if compromised. Second: when WordPress itself is compromised or the server goes down, no installed plugin works anymore. External monitoring detects precisely these situations. Third: plugin-based solutions consume server resources and increase load times. External monitoring has zero performance impact on your website.
XICTRAQ operates entirely externally. It accesses your website like a regular visitor and analyses the response. No plugin, no backend access, no server load. At the same time, it detects problems that no plugin can detect: DNS hijacking, expired SSL certificates, blacklist entries, and downtime caused by server failures. External monitoring complements internal measures and closes the gaps that plugins cannot cover.
SSL and HTTPS: Fundamental Prerequisite for WordPress Security
SSL encryption is mandatory for every WordPress website, not only for security reasons but also because Google uses HTTPS as a ranking signal and browsers actively mark HTTP pages as insecure. Despite this, SSL problems regularly occur with WordPress: expired certificates, mixed content from plugins that insert HTTP URLs, and faulty redirects between HTTP and HTTPS.
XICTRAQ continuously monitors your SSL configuration. The system checks certificate validity, remaining duration (with warnings at 30, 14, and 7 days before expiry), encryption strength, and the correct certificate chain. For Let's Encrypt certificates, which must be renewed every 90 days, this monitoring is particularly important since failed auto-renewals lead to surprising outages. Read more about SSL certificate monitoring and why it is essential for WordPress.
WordPress Updates and Version Control
WordPress regularly releases security updates for the core. Minor releases (e.g., 6.7.1 to 6.7.2) fix security vulnerabilities and are installed automatically by default. Major releases (e.g., 6.7 to 6.8) introduce new features but are not installed automatically and require manual updates, which are frequently delayed. According to WordPress statistics, approximately 40% of all WordPress installations do not run the current major version (WordPress.org Statistics).
While XICTRAQ does not directly check the internal WordPress version, it detects the consequences of outdated software: when an attack succeeds and the website is altered, the screenshot changelog shows the change. When the website lands on a blacklist or receives a Google Safe Browsing warning, the security scan detects it. And when the website goes offline after a failed auto-update, uptime monitoring alerts immediately. This multi-layered approach detects security problems regardless of their cause.
Harden WordPress Login and Access Control
The login area is the most frequently attacked part of a WordPress installation. Beyond the brute-force measures already mentioned, further hardening recommendations apply: disable the XML-RPC interface (xmlrpc.php) unless it is needed. XML-RPC allows brute-force attacks with thousands of password combinations in a single request. Disable user enumeration, which is possible via the WordPress REST API (/wp-json/wp/v2/users). Set file permissions correctly: wp-config.php to 400 or 440, directories to 755, files to 644.
Implement a Web Application Firewall (WAF) as an additional layer of protection. A WAF filters malicious requests before they reach WordPress, reducing server load and blocking known attack patterns. Monitor the access points of your WordPress installation with XICTRAQ: set up separate monitors for the login page, the REST API, and the XML-RPC interface. When an endpoint suddenly becomes unreachable or responds unusually slowly, it may indicate an ongoing attack.
Performance Monitoring for WordPress
WordPress websites have specific performance challenges. Database queries grow with the number of posts and plugins. Each plugin can load its own CSS and JavaScript files, increasing load times. And unconfigured caching means every page request goes through the full PHP processing chain. According to a Kinsta analysis, WordPress websites load an average of 15 CSS files and 20 JavaScript files (Kinsta WordPress Performance Study).
XICTRAQ continuously measures the Core Web Vitals and Lighthouse scores of your WordPress website. Performance monitoring shows trends over days and weeks and detects gradual degradation caused by new plugins, growing databases, or changed content. When a plugin update worsens load time by 500 milliseconds, XICTRAQ shows it immediately. This allows you to react before the degradation affects your SEO rankings.
WordPress-Specific Compliance Requirements
WordPress websites are subject to the same GDPR requirements as any other website. The challenge with WordPress: many plugins load external resources without explicit configuration. A contact form plugin may embed Google reCAPTCHA, a theme may load Google Fonts, and a social media plugin may set tracking pixels. Each of these external connections can constitute a privacy violation, as the Google Fonts ruling demonstrated.
XICTRAQ automatically identifies all external connections your WordPress website makes through the GDPR compliance check. You can see at a glance which third-party domains are contacted, whether cookies are set before consent, and whether the legal notice and privacy policy are reachable. This eliminates the manual review that can easily take several hours for a WordPress website with 20 plugins.
Monitor WordPress Security Holistically
WordPress security is not a single step but a continuous process. The combination of internal measures (strong passwords, regular updates, hardened configuration) and external monitoring provides the best protection. XICTRAQ covers the external side completely: uptime monitoring detects outages and defacements, security scans check headers and vulnerabilities, SSL monitoring secures encryption, and the screenshot changelog documents every visual change.
For agencies managing WordPress websites for clients, XICTRAQ offers white-label monitoring to deliver regular security reports to clients under their own brand. This strengthens client retention and demonstrates professional stewardship. Agency monitoring is particularly effective when it consolidates all client projects in a single dashboard. Start with a free demo and discover how XICTRAQ improves your WordPress security.
Why are WordPress websites particularly at risk?
Is a security plugin enough for WordPress?
How do I protect the WordPress login from brute-force attacks?
Which security headers does a WordPress website need?
How does external monitoring detect a hacked WordPress site?
How often should I update WordPress and plugins?
This article is based on data from: Core Web Vitals (Google), State of WordPress Security (Patchstack), Website Threat Research Report (Sucuri), (W3Techs), Annual Security Report (Wordfence).