WordPress powers a substantial portion of the internet, making it a prime target for cybercriminals looking for easy entry points. By understanding the most common WordPress vulnerabilities and how attackers exploit them, you put your small business site in a better position to fight back. Below is a curated list of how hackers break into WordPress and what you can do to stay secure.
1. Ignore strong passwords
When you rely on weak or predictable passwords, you open the door to brute-force attacks. Hackers use automated tools to guess credentials by cycling through lists of common or stolen passwords. Once they land on the right combination, they instantly gain admin-level access.
Without strong credentials, all your other security measures can be undermined. According to WPBeginner, stolen or weak passwords remain one of the most common ways attackers break into WordPress websites (WPBeginner).
- How to fix it:
- Use at least 12 characters with a mix of letters, numbers, and symbols.
- Change passwords regularly, especially if you suspect any compromise.
- Consider a password manager to store credentials securely and to avoid reuse across different services.
- Reduce brute-force entry points with tools like limit login attempts or by learning more about wordpress brute force attacks.
2. Neglect WordPress updates
Neglecting core software, plugin, and theme updates can expose your site to known exploits. Developers frequently release patches to address newly discovered vulnerabilities. But if you never apply these updates, your site remains vulnerable to attacks timed to target outdated code.
The importance of staying current is illustrated by the fact that only 49.8% of WordPress sites ran the latest version as of 2023, leaving the rest open to preventable attacks (Kinsta).
- How to fix it:
- Update WordPress core as soon as new versions are released.
- Keep themes and plugins current, or remove unused ones entirely.
- Turn on wordpress auto updates for minor releases to reduce manual oversight.
- Regularly check plugin dashboards to confirm all components are at the newest version.
3. Choose cheap shared hosting
While it can be appealing to go with low-cost shared hosting, these environments often house many websites on one server, creating additional risk if another site on the same server is compromised. Poor hosting security can let attackers move laterally, reaching your files even if your own configuration is solid.
Small businesses often pick budget-friendly options, but not all shared hosts meet recommended security standards for WordPress.
- How to fix it:
- Shop for reputable, well-reviewed hosts that emphasize security measures, including firewalls, account isolation, and frequent auditing.
- Check if your hosting plan includes daily backups, malware scanning, or intrusion detection.
- Consider reading our guide on shared hosting security for more details on potential dangers and recommended precautions.
4. Install vulnerable plugins
Attackers love to exploit plugins because plugins make up a large chunk of WordPress vulnerabilities. In 2023, plugins were responsible for 96.77% of new WordPress security flaws, and almost half of those were Cross-Site Scripting (XSS) issues caused by improper sanitization (Kinsta).
Once a popular plugin announces a patch for a known vulnerability, hackers race to strike websites that have not yet updated. Even newly-disclosed security flaws in lesser-known plugins can be weaponized almost immediately.
- How to fix it:
- Limit the number of plugins you install, focusing on reputable developers with a history of timely updates.
- Promptly apply patches to all plugins, or deactivate and remove any you no longer use.
- Monitor outdated plugins wordpress and keep an eye on public vulnerability reports from trusted sources, such as plugin vulnerability monitoring or SolidWP.
5. Use default ‘admin’ username
WordPress historically set the default administrator username to “admin,” which became a prime target for brute-force attempts. When hackers already know half of your login credentials, they can more easily break into your dashboard.
- How to fix it:
- Create a new admin user with a unique username, then delete or downgrade the old “admin” account (avoid admin username).
- Use a generic account label without indicating it is your main administrator, such as “site manager.”
- Stay wary of suspicious login attempts related to the “admin” username.
6. Enable unlimited login attempts
A common out-of-the-box WordPress setup is to allow as many login attempts as a user wants, which hands hackers endless opportunities to guess your password. This technique is a hallmark of brute-force strategies and automated bots that slam your site with password variations.
- How to fix it:
- Lock down repeated failed logins with free plugins such as Limit Login Attempts Reloaded, or see our tips on limit login attempts.
- Configure alerts so that you receive an email whenever unusual login activity spikes.
- Combine this approach with stronger passwords for robust protection.
7. Allow file editing
By default, WordPress permits file editing in the dashboard, enabling you to modify theme and plugin files on the fly. However, if a hacker gains admin access, file-editing capabilities make it easier to embed malicious code and create backdoors.
Malicious edits can lead to defacements or worse, complete site takeovers. WPBeginner notes that restricting file editing is a key tactic in the WordPress hardening process (WPBeginner).
- How to fix it:
- Disable file editing in your wp-config.php file using a line such as:
define( ‘DISALLOWFILEEDIT’, true ); - Rely on SFTP or your hosting control panel for theme or plugin edits instead.
- Scan regularly for changes in your files by using scan wordpress malware tools.
8. Retain XML-RPC on
XML-RPC is a core WordPress feature enabling remote publishing and communication with external apps. Unfortunately, it can amplify brute-force attacks by letting hackers attempt multiple passwords with a single request. Many small businesses do not need XML-RPC at all, leaving it activated needlessly.
- How to fix it:
- Disable this interface if you do not require remote posting or Jetpack features.
- Learn more about how to disable xmlrpc wordpress and protect against XML-RPC-based attacks.
- If you rely on XML-RPC, consider rate-limiting or additional authentication layers.
9. Opt for nulled themes
Nulled or pirated themes and plugins are often laced with hidden malicious code that grants hackers instant access to your site. Once installed, these backdoors can be extremely difficult to detect or remove fully, leading to repeated reinfections.
WPBeginner user comments reveal that using nulled software is a major cause of persistent infections, often resulting in compromised sites beyond easy repair (WPBeginner).
- How to fix it:
- Always purchase themes or plugins from official marketplaces or trusted developers.
- Avoid shady websites claiming to offer free premium products.
- Learn more about nulled themes risks to understand the hidden costs behind “free” solutions.
10. Leave directory browsing open
Allowing public access to your site’s directory listings is equivalent to giving strangers a roadmap to your website files. Attackers can quickly identify crucial directories, discover outdated software, and locate config files that might contain sensitive information.
- How to fix it:
- Disable directory browsing through your .htaccess file or server configuration.
- Confirm it is off by testing your domain plus “/wp-includes/” in your browser. If you see a blank page or 403 error, you are safe.
- Consult our guide to directory browsing wordpress for exact steps.
11. Accept all user roles
Many small businesses allow multiple team members, volunteers, or contractors to log in. However, assigning everyone the “Administrator” or “Editor” role may cause avoidable vulnerabilities, since users might unintentionally alter security settings or install questionable plugins.
With more high-level accounts, the risk of an attacker finding an inroad through one compromised password multiplies.
- How to fix it:
- Assign each person the lowest level of access they require (wordpress user roles security).
- Maintain a strict policy for user creation and removal.
- Periodically review accounts and revoke any that are inactive or unnecessary.
12. Avoid two-factor authentication
Two-factor authentication (2FA) adds an extra layer of security by requiring a unique one-time code (often from a mobile app) in addition to your password. Without 2FA, all a hacker needs is your login credentials, which can be purchased on the dark web or discovered through brute force.
- How to fix it:
- Implement 2FA plugins like Google Authenticator or Authy for WordPress.
- Remind all administrators and contributors to set up two-factor for personal safety.
- Keep backup codes in a secure location in case you lose access to the authentication app.
13. Skip firewall plugins
Failing to use a web application firewall (WAF) or security scanner puts your site at higher risk, as malicious traffic can strike your website directly without filters. WordFence, Sucuri, and Cloudflare all provide firewall and malware scanning solutions that block harmful requests before they do damage.
In a single 48-hour period, Wordfence blocked 1.6 million attacks on WordPress websites, showing just how active hackers can be (Forbes).
- How to fix it:
- Install or enable wordpress firewall plugins or cloud-based WAF solutions.
- Configure your firewall to detect and block common threats like SQL injection or cross-site scripting.
- Regularly check firewall logs to spot suspicious patterns.
14. Forget about backups
Without a consistent backup plan, you risk permanent data loss if a hacker succeeds. Malware or ransomware can erase or encrypt your site’s content, leaving you with no fallback version to restore. Restoring a recent, clean backup is often the fastest way to recover from an attack.
- How to fix it:
- Set up automatic backups on a schedule that fits your site updates and traffic volume.
- Keep copies stored offsite, in cloud storage services or a secure external drive.
- Learn more about the importance of wordpress backups and how to do them reliably.
15. Ignore suspicious traffic
Hackers frequently test small business sites with scans or minor probes to see if known exploits exist. If you do not monitor your traffic or error logs, you could miss early signs of infiltration, giving attackers ample time to find a weakness.
- How to fix it:
- Track access logs and error logs in your hosting control panel or security plugin dashboard.
- Use security monitoring services that alert you to surges in bot traffic or suspicious requests (monitor wordpress security).
- Investigate sharp spikes in failed login attempts, malicious file uploads, or unusual page visits.
Key takeaways
- Keeping WordPress core, themes, and plugins updated is foundational for security.
- Prioritizing strong passwords, limiting login attempts, and implementing two-factor authentication drastically reduce brute-force success.
- Nulled themes and plugins often harbor malware that can reinfect your site permanently.
- Firewalls, backups, and active monitoring put you in control, rather than reacting only after you have been hacked.
One step at a time goes a long way. Even if your budget is limited, you can make meaningful changes to protect your WordPress site from the most common attacks.
Frequently asked questions
1. Do small business sites really need advanced security?
Yes. Small businesses are prime targets because attackers assume you might not have dedicated security staff. Even basic measures like firewalls and strong passwords provide huge benefits.
2. How often should I update my WordPress plugins?
Check for updates at least once a week. If a plugin releases a critical security patch, update it as soon as possible to mitigate potential exploits.
3. Is the WordPress core software itself insecure?
WordPress core is frequently audited for vulnerabilities and is considered secure (WPBeginner). Most breaches stem from out-of-date plugins, themes, or weak passwords.
4. Can I trust free plugins from the WordPress repository?
Generally, yes, but always research the development team, update history, and user reviews. Track vulnerability disclosures through plugin vulnerability monitoring for peace of mind.
5. What happens if I use nulled themes or plugins?
Nulled themes or plugins often include hidden backdoors and malicious scripts. They can easily compromise your entire website. It is best to avoid them entirely.
6. Should I limit login attempts even if I have strong passwords?
Yes. Hackers often use automated tools to guess passwords. Limiting login attempts helps stop brute-force attacks sooner, safeguarding even strong credentials.
7. How do I disable file editing?
Add the following line to your wp-config.php file:
define( ‘DISALLOWFILEEDIT’, true );
This will remove the built-in plugin and theme editor from your WordPress dashboard.
8. Why is XML-RPC such a problem?
XML-RPC enables an attacker to try multiple password attempts in one request, amplifying brute-force attacks. If you are not using remote publishing features, it is safer to disable XML-RPC.
9. What is the difference between a web application firewall and a regular firewall?
A web application firewall (WAF) inspects and filters traffic specifically for website vulnerabilities, such as SQL injection. A regular firewall typically protects your network perimeter but may not filter WordPress-specific threats.
10. Should I monitor my logs if everything seems fine?
Absolutely. Logs are your early warning system. Many hackers probe for weaknesses before launching a larger attack, so tracking unusual spikes in activity can prevent breaches.
11. If my site is hacked, do I have legal obligations?
Depending on data privacy laws in your region, you might need to inform users or customers about a breach. Consult local regulations or speak with a legal professional if you handle sensitive data.
12. Can I just restore a backup if I am hacked?
Yes, restoring a clean backup is a quick way to recover. However, it is crucial to remove the vulnerability that allowed the hack in the first place. Otherwise, the attacker could break in again.
13. Why is 2FA not more common on WordPress sites?
Some users find two-factor authentication inconvenient, or they do not know about it. Fortunately, adding 2FA is straightforward and significantly improves security.
14. Is changing my username from “admin” enough to protect me from brute force?
No. It helps, but you should combine a custom username with strong passwords, limited login attempts, and 2FA for the best defense against brute-force strategies.
15. How often should I audit my security settings?
Aim for a monthly or quarterly audit. Regular checks keep you informed of any new vulnerabilities and help ensure that your defenses remain strong.
Focusing on these key areas will help you secure your WordPress site and prevent hackers from exploiting common vulnerabilities. With a bit of vigilance and a routine maintenance schedule, you can protect your small business site from many of the most frequent and damaging attacks.
