The Complete WordPress Security Guide
Section 0.0: Learning to crawl
Answering common security questions
▶ Why would someone hack my site?
Before diving into WordPress security, let’s answer a simple question: “Why would someone hack my site? It’s small. I don’t sell anything. Why would anyone bother?”
The truth is that hackers don’t really hand-pick sites. Therefore, most attacks aren’t about size, traffic, or whether you handle payments or not. Instead, it’s about targeting vulnerabilities that are often hidden in WordPress plugins.
How do hackers do it?
They run automated scans across countless IP addresses. If a site happens to be running a plugin with an exposed weakness, it becomes a target. One unpatched vulnerability in a popular plugin can give attackers access to thousands of sites at once. And if your site is among them and lacks the proper security setup, it could get hacked.
💬 Oliver Sild (CEO at Patchstack): The moment you register a domain and put it online, you become a target. This isn’t theoretical — we’ve tested it. We registered a brand-new domain, installed a dummy WordPress site, connected it to Patchstack, and tracked how long it took before the first attack attempt. It was 17 minutes. Being online automatically means being targeted.
▶ What are the most common website hacks?
We often call every website attack a “hack.” But not all hacks are the same. Let’s clarify the most common ones so you know what to watch for.
↦ Malware - “bad code” Malware is harmful software that sneaks onto your website and can steal data, spread spam, or redirect visitors to other shady sites. If it slips in, visitors may see random pop-ups, spam, or unsafe content. As a consequence, Google blacklists malware-infected sites to protect users from system damage, data theft, and malicious software downloads, causing traffic to drop fast.
↦ Hack - “breaking in” A hack happens when someone finds a weak spot, such as an outdated plugin or a weak password, to break into your site. Once inside, they might lock you out and demand ransom (remember the WannaCry ransomware), or steal sensitive client and visitor data. Recovery can be costly and take time, all while your site remains down or dysfunctional.
↦ Brute force attack - “password guessing” A brute force attack is when hackers use bots to try thousands of password combinations until they get the right one to access your website. Weak or reused passwords make it easier for them to orchestrate a fast break-in. If a brute force attack happens on one of your sites, admin accounts can be hijacked, giving hackers full control.
↦ DDoS attack - “traffic jam” DDoS (Distributed Denial of Service) attack is when hackers flood your server with fake traffic so real visitors can’t get through. Your site could go offline, sometimes for hours or days, causing loss of legitimate traffic and revenue for your client during downtime.
↦ SQL injection - “database break-in” SQL Injection happens when hackers trick your website into giving them direct access to its database. They do this by sneaking malicious commands into places like login forms or search bars. Sites with outdated plugins or poorly coded forms are the most vulnerable.
For WordPress specifically, most attacks come from exploiting vulnerabilities in existing themes or plugins. Next, we’ll cover what vulnerabilities really are.
▶ What are WordPress vulnerabilities?
A vulnerability is a flaw in the code logic that exposes a weakness in software that can be exploited. In WordPress, they appear in core, themes, or plugins. They don’t exist because the software is poorly made, but because even the best software can develop vulnerabilities over time as technology advances and sophisticated attack methods emerge. So even the most well-built plugins and themes can have weak spots waiting to be discovered.
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💡 In 2024, Patchstack’s researchers discovered 7,966 new security vulnerabilities in the WordPress ecosystem. That’s roughly 22 every single day. A staggering 96% were in plugins, 4% in themes, and only 7 in WordPress core itself. None of the core issues were severe enough to create a widespread threat.
We often hear about two types of vulnerabilities:
● Zero-day: Exploited before the plugin developers even know about the issue, often within hours of discovery.
● One-day: Exploited after the plugin developers release a vulnerability patch. Hackers watch plugin changelogs, then rush to attack sites that haven’t updated the plugin yet.
To fix vulnerabilities, you need to keep plugins, themes, and WordPress core updated as often as possible. But updates alone won’t secure your sites from everything. With over 80,000 plugins in the ecosystem, new flaws are found all the time, and attackers often strike before site owners or developers can patch them. The best way is to take proactive steps instead of reacting to an issue.
▶ Why is getting hacked a big deal?
The impact of any of the website attacks we explained before isn’t just technical - it can also be financial, reputational, and operational. But what exactly could go wrong?
↦ SEO damage - A hacked site often gets blacklisted, dropping out of Google rankings. Even after cleanup, recovery can take weeks or months, costing traffic and revenue.
↦ Ransomware - Attackers may lock the site and demand Bitcoin payments to restore it. Without proper backups, site owners are stuck in a very uncomfortable position.
↦ Malware and data theft - Website visitors can be infected, and their payment data can be stolen. A scenario like that can cause major damage to a brand's reputation, from which some businesses may never recover.
↦ Resource hijacking - Attackers might use a site to host spam, run redirects to other suspicious websites, or even join botnets.
↦ Regulatory fines - If customer data is exposed during the hack, the site owner could face penalties under laws like GDPR and CCPA.
These are some scenarios that can follow if a site gets hacked. Cleaning up the mess is not easy, and even after it’s fixed, trust and search rankings may take a long time to recover. But a proper security setup can prevent these problems, and we’ll explain how later in this guide.
▶ Next sections in the guide answer:
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