# B2B Website Security: Three Common Breaches and Prevention _Last updated: 2026-06-30_ WordPress can be very secure if configured correctly. Website security requires continuous protection across access management, plugin vetting, layered defenses, and monitoring. This guide covers three common B2B website security breaches and how to prevent them. ## Core Security Pillars Website security rests on four pillars: 1. **Manage access** — Implement login protection, regularly manage users and their roles, restrict hosting access, and close unneeded APIs. 2. **Approach plugins and third-party integrations with caution** — Avoid unmaintained, unpopular, or orphan plugins and scan theme dependencies for vulnerabilities. 3. **Create multiple layers of protection** — Set up a CDN/WAF proxy on the top layer, an application firewall on the website, and secure change deployments. 4. **Backup and monitor** — Regularly monitor the website for changes, uptime, and health. Perform security audits and maintain backups with automation to roll back to a prior version. Good website security results from choosing the right technology (platform, hosting, plugins, and security layers), protecting access through user management, and monitoring and patching any unexpected changes or vulnerabilities. ## Case Study 1: Lead Heist via Formula Injection ### Scenario A company used Marketo embedded forms. Marketo does not limit character types or length during form entry or sanitize the data after input. A hacker submitted a form with a formula injection in one field. When the company downloaded a list of leads into Excel, the injected formula selected rows in the spreadsheet and sent the data to a remote server. The attacker gained access to names, emails, phone numbers, company information, and other data in the exported spreadsheet. The attack only works if the company downloads data into a spreadsheet. While attackers can identify Marketo forms, they likely relied on the target company's routine practice of exporting lead data. ### Business Impact The hacker obtained personally identifying information (PII) in the lead list. The breach scope depends on how much data the client exported with that malicious record. PII breaches damage trust and violate data privacy regulations. ### Prevention To prevent formula injection attacks: - Avoid exporting form data to a spreadsheet when possible. - Carefully select form input types and always sanitize inputs. - Restrict special characters in text fields to prevent formula injection. - Implement server-side sanitization by setting character-type and character-length limits via code on the front-end. Leading marketing automation systems do not offer character-type limits without additional code or automations to scrub text for unexpected characters. ## Case Study 2: Malicious Plugin with Hidden Redirect ### Scenario WordPress is open-source; developers can create plugins that extend website capabilities. Plugins introduce third-party code. A popular free plugin introduced a code change that redirected a portion of traffic to another website (a gambling site). It remains unclear whether the plugin author was hacked or intentionally added malicious code for extra income, but the plugin impacted many websites. ### Business Impact A redirect degrades domain authority, negatively impacts keyword ranking, and causes Google to un-rank or bury content in search results. This obliterates search traffic, damages user experience for prospective customers, and calls product and data security into question. ### Diagnosis and Fix Once a plugin causes a breach, teams must identify it by disabling plugins one-by-one to replicate the issue, which breaks website functionality during diagnosis. Multi-layered caching can complicate complete resolution. ### Prevention Every plugin introduces risk, even paid plugins. Airfleet uses the following protocol to reduce risk: 1. Check with hosting partners to ensure the plugin is not on a blacklist (e.g., WP Engine's [blacklist](https://wpengine.com/support/disallowed-plugins/)). 2. Maintain a separate blacklist based on direct experience or client feedback. 3. Review plugin details: frequency of updates, download count, and rating. 4. Review the plugin author's background to determine legitimacy. 5. Ensure compatibility with WordPress's latest version. Once approved, install the plugin in a staging environment and test for compatibility issues or negative impacts on UI, performance, or security. If issues arise, do not deploy to production. Retain an audit history of plugin updates that catalogs installed versions over time to correlate breaks with specific updates. ## Case Study 3: Unauthorized Website Edits ### Scenario Website content changes unexpectedly — titles jumble on the home page, product pages display odd text. No one admits to making changes, but everyone sees them. The cause can be human error, intentional defacement by a disgruntled contractor or former employee, an unexpected feature behavior, or a bug. ### Business Impact Intentional defacement can harm company reputation, particularly if false claims are made about products or executives. Unnoticed changes harm the marketing department's reputation within the organization. ### Prevention Follow these best practices to reduce unauthorized or accidental changes: 1. **Limit user access** — Never provide access to users who don't need it. Restrict users to their job functions. SEO specialists and copywriters do not need administrator access or access to hosting, DNS, or CDN. Provide advanced access only to qualified personnel. 2. **Review users regularly** — Revoke permissions when employees or freelancers leave. 3. **Disable open APIs** — WordPress uses xml-rpc for remote read/write capabilities; disable it. Block open endpoints that expose user data. Test by appending **/wp-json/wp/v2/users** to the domain; it should be blocked when properly secured. 4. **Monitor activity** — Use tools like Wordfence (application firewall) and WP Security Audit Log plugin, which logs logins, page edits, and settings changes. 5. **Enforce login best practices** — Use two-factor authentication (2FA) as standard. Enforce strong passwords, never share profiles, and recommend password managers. Change the default WordPress login path from /wp-login to something difficult to guess. 6. **Use a WAF proxy** — Add a Web Application Firewall (WAF) such as Cloudflare, Cloudfront (AWS), Imperva, or Akamai. Cloudflare offers strong value in entry tiers. Restrict administrator access by IP or region. Restrict public-facing website access to certain countries or regions. Add all crucial [security headers](https://securityheaders.com/). ## Ongoing Audits and Prevention Regular audits act as the critical third layer of defense, catching vulnerabilities before they become problems. Periodic examinations keep security measures ahead of evolving attacker tactics. Airfleet developed a clear audit protocol to analyze all security aspects and address issues. Website owners receive a simple report with action items. Trust and transparency are key to website security.