Originally published: May 5, 2020. Last updated: Oct 11, 2026.
Every business website is a potential target, and attackers no longer pick only the big names. Automated bots probe thousands of sites every day for a known weakness, and a single compromised plugin or stolen password can turn a brochure site into a malware distributor or a ransom note. The OWASP Top 10, the industry standard list of web application risks, was updated in 2025 and remains the baseline for 2026, with supply chain attacks and unsafe error handling joining the list as named categories. This guide translates the threats that matter most to business owners in 2026 into plain language, with practical steps to lower the risk.
Why website attacks are harder to ignore in 2026
Two things changed the picture since this article was first written. First, the numbers got worse. Security firm Patchstack reported 11,334 new vulnerabilities in the WordPress ecosystem in 2025, up 42 percent from the year before, with 91 percent of them hiding in plugins rather than in WordPress itself. Only 6 of those vulnerabilities were in WordPress core. Worse, the median time between a vulnerability becoming public and the first mass exploitation attempts was just 5 hours, and 46 percent of vulnerabilities had no patch available when they were disclosed (Colorlib’s roundup of the Patchstack 2026 report).
Second, the reference list security teams use was rewritten. The OWASP Top 10:2025, released in November 2025 and finalized in January 2026, is the current standard. Two categories are entirely new: A03 Software Supply Chain Failures, which jumped straight to number 3, and A10 Mishandling of Exceptional Conditions. Security Misconfiguration climbed from number 5 to number 2, and server side request forgery was folded into Broken Access Control (Reflectiz’s OWASP Top 10 2026 guide). Here is what that means for your business website, attack by attack.
1. Injection attacks: SQL injection and cross site scripting
Injection happens when an attacker slips malicious commands into places your website expects normal input, such as a search box, a contact form, or a login field. SQL injection targets your database directly and can expose customer records, orders, or login credentials. Cross site scripting (XSS) is the sneaky sibling: it injects scripts that run in your visitors’ browsers, letting attackers steal sessions, redirect users, or deface pages. XSS alone accounted for nearly half of all WordPress vulnerability types in recent Patchstack data, and injection remains a mainstay of the OWASP Top 10 at A05.
What it costs a business: stolen customer data, a defaced site that destroys trust, and in regulated cases, legal exposure from a data breach.
Reduce the risk: keep your CMS, themes, and plugins updated so known injection flaws get patched; use a web application firewall (WAF) that can block common injection patterns; and ask your developer whether your site’s database account follows least privilege, meaning it can only touch the data it truly needs. If you run a custom site, make sure all user input is validated and parameterized queries are used, which your developer will understand.
2. Broken access control and stolen logins
Broken Access Control is the number one risk in the OWASP Top 10:2025, and it is simpler than it sounds. It means parts of your site that should require a login, or a higher permission level, can be reached anyway. Alongside it, authentication failures cover weak passwords, credential stuffing with leaked password lists, and missing multi factor authentication. In September 2026, security researchers tracked more than 300,000 automated probe attempts in five days against a single WordPress vulnerability (CVE-2026-87902), starting within hours of the patch release (CrowdSec’s report). Attackers scan for these holes constantly, not just when news breaks.
What it costs a business: an attacker with an admin login can install malware, redirect your checkout, or lock you out of your own site.
Reduce the risk: require multi factor authentication for every admin account, and prefer phishing resistant methods like authenticator apps or passkeys where available, which is exactly what CISA’s cybersecurity essentials for businesses recommend. Use a password manager with long unique passwords, delete old staff and contractor accounts, and never share one admin login across the team.
3. Supply chain attacks through plugins and third party scripts
This is the headline new risk of the 2026 threat landscape. A supply chain attack does not target your site directly. It compromises something your site trusts: a plugin update, a chat widget, an analytics script, or a marketing pixel. In September 2026, attackers compromised infrastructure behind Brevo’s widely used scripts and pushed malicious JavaScript to more than 100,000 websites, attempting to install backdoor plugins on sites where an administrator happened to be logged in (CyberInsider’s report on the Sansec forensics findings). That same month, critical flaws in The Events Calendar plugin put more than 600,000 WordPress installations at risk of full takeover (CybersecurityNews). OWASP created A03 Software Supply Chain Failures for exactly this pattern, and half of the respondents in OWASP’s community survey ranked it their number one concern.
What it costs a business: your site spreads malware to your own customers, your brand ends up in a security headline, and cleanup means auditing every third party you ever embedded.
Reduce the risk: keep your site’s structure lean and remove plugins and scripts you do not actively use, because every dependency is an attack path you are responsible for (see how website structure choices affect your attack surface). Install updates only from official sources, review what third party scripts load on your pages, and consider a content security policy, which your developer can set up to limit what scripts are allowed to run.
4. Phishing aimed at your team, not your server
Many website takeovers start in an inbox, not in code. An attacker sends a convincing email that looks like it comes from your hosting company, your domain registrar, or a plugin vendor, warning of a billing problem or a required security update. One click on the fake login page hands over the credentials that unlock your entire site. CISA lists training employees to avoid phishing as the first of its four cybersecurity essentials for businesses, because human error remains the most reliable entry point attackers have.
What it costs a business: credential theft that bypasses every technical control you paid for, followed by full site compromise.
Reduce the risk: train everyone with site access to verify unexpected requests through a separate channel, never by replying to the message or using its links. Turn on multi factor authentication so a stolen password alone is not enough. Make it easy and blame free for staff to report suspicious emails, since fast reporting can stop an attack mid course.
5. Ransomware and extortion against websites
Ransomware is no longer just an office network problem. Attackers exploit vulnerabilities in public facing websites and servers, then encrypt the site’s files or steal customer data and demand payment. Some groups skip encryption entirely and simply threaten to publish the stolen data. Either way, the business faces the same choice: days or weeks offline, or paying criminals with no guarantee of recovery. The attack often begins with one of the flaws above, an unpatched plugin or a stolen admin login, which is why ransomware belongs on a website security watch list.
What it costs a business: extended downtime, lost orders, ransom demands, and the reputational damage of telling customers their data was stolen. If your site handles payments or client records, the exposure is even more serious (read how to protect financial and accounting data from cyberattacks).
Reduce the risk: keep automated backups of your website and database, stored separately from the site itself, and test that you can actually restore from them. CISA puts backups alongside MFA and patching as actions to take immediately. Write down a basic incident response plan: who do you call, in what order, when the site goes down or gets defaced? Having that plan on paper saves panicked hours (a practical look at fixing server down issues covers the recovery mindset).
6. DDoS attacks that knock your site offline
A distributed denial of service attack floods your site with junk traffic from thousands of compromised devices until real visitors cannot get through. The motive is often extortion, a competitor dispute, or simply opportunistic mischief. Your site does not need to be breached for a DDoS attack to hurt you: hours of downtime during a sales period cost revenue directly and erode customer trust, since visitors cannot tell a flood of fake traffic from a business that went dark.
What it costs a business: lost sales during the outage, emergency mitigation fees, and customers who assume the worst.
Reduce the risk: put your site behind a content delivery network or DDoS protection service that can absorb floods before they reach your server; most reputable hosts and cloud providers offer this as an add on. Set up uptime monitoring so you learn about an outage from an alert, not from an angry customer. For a deeper walkthrough, see our guide on effective methods for mitigating a DDoS attack.
Malware on a website rarely announces itself. It hides in theme files, uploads folders, or database entries, quietly redirecting visitors to scam pages, injecting spam links that wreck your search rankings, or skimming payment details at checkout. Backdoors are worse: small pieces of code that let attackers return even after you think you cleaned the site. Drive by downloads, trojans, and spyware are the classic forms, but modern website malware is usually built for persistence and profit, not noise.
What it costs a business: blacklisting by Google, which tanks your traffic overnight; stolen customer payment data; and repeat infections that make every cleanup feel temporary.
Reduce the risk: run regular malware scans through your host or a reputable security plugin, and investigate any unexpected file changes. Keep clean, tested backups so you can restore to a known good state instead of playing whack a mole with infected files. When in doubt, have a professional clean the site and change every password and API key afterward, because a backdoor plus an unchanged credential is an open invitation to return.
A simple 2026 security baseline for business owners
You do not need a security department to cover the fundamentals. Two respected frameworks say nearly the same thing in plain terms. CISA’s four cybersecurity essentials for businesses are: train employees to avoid phishing, require strong passwords, require multi factor authentication, and update business software. The NIST Cybersecurity Framework 2.0 organizes the same idea into six functions: Govern (someone owns security decisions), Identify (know what sites, accounts, and vendors you have), Protect (MFA, updates, backups), Detect (monitoring and alerts), Respond (an incident plan), and Recover (tested restores).
Turned into a checklist for a business website, that becomes: update everything on a schedule and remove what you do not use; enforce MFA and unique passwords for all admin accounts; keep automated off site backups and test restores; add a WAF or DDoS protection in front of the site; monitor uptime and file changes; write a one page incident plan with names and phone numbers; and review third party scripts and plugin vendors at least twice a year. Our companion guide to cybersecurity measures for businesses walks through the protective side in full, and if the list feels beyond your team’s capacity, locating quality cloud security consulting services explains what to look for in outside help.
Frequently asked questions
What is the most common type of website attack in 2026?
For typical business websites, especially WordPress sites, the most common successful attacks exploit known plugin vulnerabilities and stolen credentials. Patchstack’s 2026 data shows 91 percent of WordPress vulnerabilities sit in plugins, and attackers probe for them within hours of disclosure. Broken access control tops the OWASP Top 10:2025, which matches what defenders see in practice.
How can a small business protect its website from hackers?
Cover the fundamentals before anything exotic: keep the CMS, themes, and plugins updated; require multi factor authentication on all admin accounts; keep automated off site backups and test restoring them; remove unused plugins and scripts; and put the site behind a web application firewall or DDoS protection. CISA’s four cybersecurity essentials, train staff on phishing, strong passwords, MFA, and software updates, are the right starting point.
What does OWASP say are the top website risks in 2026?
The current OWASP Top 10:2025 lists, in order: Broken Access Control, Security Misconfiguration, Software Supply Chain Failures, Cryptographic Failures, Injection, Insecure Design, Authentication Failures, Software or Data Integrity Failures, Security Logging and Alerting Failures, and Mishandling of Exceptional Conditions. Supply chain failures and mishandled errors are the two new categories since 2021.
Can a hacked website hurt my customers?
Yes. A compromised site can serve malware to visitors, redirect them to phishing pages, or skim payment details at checkout, as seen in the September 2026 Brevo supply chain incident that pushed malicious scripts to more than 100,000 sites. Google may also blacklist a hacked site, which destroys the trust you built with searchers and customers alike.
How often should a business website be updated and backed up?
Apply security updates as soon as they are available, since mass exploitation can begin within hours of a public disclosure. Back up the site and database automatically, ideally daily for active sites, store copies separately from the server, and test a restore at least quarterly so you know the backups actually work when you need them.
Do I need a cybersecurity expert for a small website?
Not necessarily for the basics, which most owners or their web developers can handle: updates, MFA, backups, and lean plugin lists. Bring in an expert for a security review if you handle payments or sensitive customer data, after any suspected breach, or when setting up protections like a web application firewall and content security policy for the first time.
Website security is not a one time project. Threats evolve, which is why the fundamentals, getting the basics right, key essentials every small business website needs, and the protective measures in our cybersecurity measures guide, matter more than any single tool. Review this page’s checklist twice a year, and treat every plugin, script, and account as something you are responsible for.
