The Security Risks Hiding in Your WordPress Website

WordPress powers around 42% of all websites on the internet, according to W3Techs. It is the platform of choice for thousands of UK businesses running customer-facing sites that take bookings, process payments, or handle personal data. That popularity, however, comes with a cost. Attackers routinely target WordPress because its common configurations, themes and plugins are well understood, and weaknesses are often identified and exploited quickly. If your business runs on WordPress, a generic security review may miss risks tied to WordPress-specific plugins, themes and configurations. You need testing that covers the WordPress-specific plugins, themes and configurations attackers target, and actively probes the running site for exploitable weaknesses.

The Plugin Risk Many Businesses Underestimate

The strength of WordPress is its ecosystem. Thousands of plugins let you add contact forms, payment gateways, booking systems, SEO tools, and almost anything else you can think of. The problem is that every plugin you install is another door into your website, and not all of those doors are locked properly. Themes deserve the same scrutiny, and abandoned or poorly maintained add-ons are one of the biggest practical risks, because vulnerabilities in them may never be patched at all.

Many of the WordPress sites we scan were built two or three years ago by an agency or a freelancer who has since moved on. The plugins are still there, still running, still exposed, but no one has a clear remit to keep them patched. That is where the worst compromises begin.

Patchstack's State of WordPress Security report found 11,334 new vulnerabilities in the WordPress ecosystem in 2025, up 42% from the year before. 91% of those were in plugins. Nearly half had no fix available at the time they were disclosed.

To put that into perspective, Patchstack's research found that the most heavily targeted vulnerabilities were exploited within a weighted median of just five hours of being publicly disclosed. That is the window between a flaw becoming known and attackers actively using it.

In March 2026 alone, three widely-used plugins in the WordPress ecosystem shipped security patches:

• Elementor (10+ million active installs) - incorrect authorisation allowing private template content to be read

• Yoast SEO (10+ million active installs) - authenticated stored cross-site scripting

• WPForms (6+ million active installs) - sensitive data exposure in form submissions

The WPForms issue was particularly concerning because it allowed an external attacker to retrieve sensitive information from form submissions, which on many sites includes personal details entered through contact and enquiry forms.

This is not a rare event. It is the reality of running a WordPress site in 2026.

The Quiet Damage You Won't See on Your Homepage

A compromised WordPress site rarely announces itself. Orders keep processing, pages keep loading, and the first sign of trouble is often a GDPR notification, a collapse in organic traffic, or a cardholder complaint routed through your bank. By the time anyone notices, the damage is already done.

Beneath the surface, the damage takes a handful of familiar forms:

• SEO spam injected into your pages, tanking the search rankings you spent years building

• Backdoors installed that persist even after you think the problem is resolved

• Visitors silently redirected to malicious sites without your knowledge

• Customer data stolen from forms and checkout pages without triggering a single alert

Sucuri's 2023 Hacked Website Report found WordPress on 95.5% of the compromised CMS-based websites they remediated, a pattern that has held consistently across their reporting for years. That figure reflects WordPress's market dominance as much as anything else, but for the sites affected the business impact is real: lost customer trust, regulatory exposure under GDPR, damaged search visibility, and the cost of a full cleanup that could have been avoided with proactive testing.

What a Proper WordPress Test Actually Finds

A thorough vulnerability scan and web application assessment does more than check for expired certificates. When applied to a WordPress site, it picks up the kinds of issues that leave businesses exposed:

• Known vulnerabilities in the software running on your server, matched against published CVE records and current threat intelligence sources

• SQL injection, cross-site scripting, and other OWASP Top 10 weaknesses in your web application

• Authentication and session handling flaws that could let an attacker bypass your login

• Information disclosure, where your site is leaking data it should not be exposing

• Misconfigurations and security header gaps that weaken your defences without you realising

With server monitoring in place, you also get alerts for file tampering, hidden malware, and rootkit activity, catching threats that have already made it past the front door.

Not sure what's actually running on your WordPress site? A Shield scan gives you a full external vulnerability report and a clear security grade (A, B, C, D or F), a straightforward starting point for understanding where you stand.

Keeping WordPress Secure Is Not a One-Off Job

WordPress updates frequently, plugins update even more frequently, and new vulnerabilities are disclosed every week. A penetration test carried out twelve months ago tells you very little about your current exposure. The sites that stay secure are the ones with ongoing monitoring, regular scanning, and a clear picture of what is running and whether it is up to date.

Automated vulnerability scanning picks up new issues as they emerge and gives you a continuous view of your security posture rather than a single snapshot in time. It is the most practical way to stay ahead of the threat landscape without requiring your team to become security experts.

Scanning and testing work best alongside the basics. Prompt patching, two-factor authentication on every administrator account, strong passwords, least-privilege access, removal of unused plugins and themes, and reliable off-site backups all reduce the ways an attacker can get in, and limit the damage if they do.

How iSOS Keeps WordPress Sites Secure

Based in Brighton and working with UK businesses for over 18 years, iSOS helps organisations understand and manage their digital security, including the specific risks that come with running a WordPress website. When a scan flags something serious on a Tuesday afternoon, you want a UK-based engineer on the line walking you through what matters, not an automated ticket queued behind a thousand others. WordPress security at iSOS is delivered end-to-end by our in-house security team. The same engineers who run the scans also triage the findings, advise on remediation, and stay with you while you act on them. We offer three packages depending on how much ongoing cover you want, plus one-off scans for businesses that aren't ready to commit to a package:

• Shield - Monthly external vulnerability scanning with a clear security grade (A, B, C, D or F). A straightforward starting point for most businesses.

• Sentinel - Everything in Shield, plus continuous server monitoring and real-time intrusion alerts. For businesses that need deeper visibility into what is happening on their server.

• Citadel - Everything in Sentinel, plus weekly scanning and comprehensive reporting. Built for organisations handling sensitive data or operating under compliance requirements.

If you inherited a WordPress site and have no easy way to tell whether its plugins are still being patched, the simplest next step is a one-off Shield scan. You will get a clear grade and a list of what actually needs attention, with no sales pressure.

Get in touch: call us on 01273 358100 (Monday to Friday, 9am to 5pm, with an out-of-hours emergency line available) or send a message via the contact form at isos.com/contact-us. We aim to respond to every enquiry within one business day.