WordPress Security: Common Vulnerabilities and Ways to Fix Them

Quick Summary: WordPress security is crucial to protect your website and data. But vulnerabilities are the roadblock to it. This article will provide a deeper understanding of how vulnerabilities affect the security of your WordPress site and provide solutions to them. Keep reading to get the information to secure your website and data.

WordPress is the most popular website builder today, with most websites on the web built on this platform. Indeed, as per W3Techs, 62.7% of all websites that use a CMS are built on WordPress. It shows the immense popularity of this website builder.

However, the popularity of this platform also makes it more susceptible to cyberattacks. There are different types of WordPress security risks that result in data breaches or security compromises. Vulnerabilities are the primary reason for these security issues.

They are the hidden loopholes that attackers can exploit to breach a website’s security. Identifying and fixing these loopholes is paramount to securing WordPress websites. But how do these vulnerabilities occur and how can you fix them? We will explore these questions here.

Stay tuned to this article to understand WordPress vulnerabilities and how they impact its security. You will also find the best practices you can follow to ensure security and how you can automate it using WordPress vulnerability scanner to improve the security of your website. Let’s dive deeper for a better understanding.

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Why is WordPress Highly Vulnerable to Cyberattacks?

WordPress is one of the most targeted content management systems because of its massive adoption, extensive plugin ecosystem, and customizable architecture. While the WordPress core is regularly secured, outdated components, insecure configurations, and poor security practices often create exploitable attack surfaces for cybercriminals.

1. Massive Global Adoption

WordPress powers a significant portion of the web, making it an attractive target for automated attacks. Cybercriminals build exploit kits and bots that can scan millions of WordPress websites for known vulnerabilities at scale.

2. Vulnerable Plugins

Plugins extend WordPress functionality, but poorly coded, outdated, or abandoned plugins frequently introduce security flaws such as SQL injection, Cross-Site Scripting (XSS), authentication bypass, and remote code execution vulnerabilities.

3. Insecure Themes

Custom and third-party themes can contain insecure code, outdated libraries, or improper input validation. Attackers often exploit these weaknesses to inject malicious scripts, access sensitive files, or gain unauthorized access.

4. Delayed Security Updates

Many website owners postpone updating the WordPress core, plugins, or themes. Unpatched software leaves publicly known vulnerabilities exposed, allowing attackers to exploit websites using readily available exploits and automated scanning tools.

5. Extensive Third-Party Integrations

WordPress websites commonly rely on multiple plugins, themes, APIs, payment gateways, and external services. Every integration introduces another potential attack vector that can increase the overall security risk if not properly maintained and monitored.

Most Common WordPress Vulnerabilities and Solutions

WordPress security issues arise from different types of vulnerabilities. Mostly, poor security practices are behind these vulnerabilities like using plugins from untrusted sources. You can enhance the security of your website by identifying and resolving these hidden weak spots. The following are the major reasons for WordPress vulnerabilities.

Plugins, Themes, and Core Vulnerabilities

In most cases, WordPress security issues arise due to vulnerabilities in the core, themes, and plugins. However, you must note that only a small fraction of vulnerabilities are found in the core. Only 13 vulnerabilities were reported in the core in the previous year, as per WPScan report.

The major threat comes from themes and plugins. In fact, plugins have the lion’s share of vulnerabilities, which is found at around 95% of total vulnerabilities. Mainly, these vulnerabilities arise from failing to update the core files, plugins, and themes.

Besides common WordPress vulnerabilities, security risks also arise from using malicious plugins. There have been many cases when a plugin posed as legitimate but found to be a malware by researchers.

Solution:

• Updating WordPress regularly will help you avoid loopholes that could result in security breaches.
• Themes and plugins, as we have mentioned, are significant reasons for security issues. Hence, you must always keep them up to date.
• Don’t install unnecessary plugins, as it will affect both performance and security. Avoiding such plugins will reduce the potential vulnerabilities.
• Are there plugins installed that you no longer need? Deactivate or remove plugins that you don’t need.

Weak Password Vulnerabilities

Another WordPress vulnerability that can cause security issues is weak passwords. These passwords can be easily cracked by attackers using methods like brute force. Besides, it could also lead to credential theft. After obtaining the password, an attacker can access your website.

Suppose there is an account with administrative privileges and the password is weak. In this situation, an attacker can access the account by brute-forcing the password. As a result, the attacker will have complete control over the server.

After this, the security of your website will be compromised, and sensitive data could go into the hands of bad actors. You can prevent such issues by using best practices for passwords.

Solution:

• Ensure that all users choose strong passwords for their accounts. You can define a password policy which is the rules that must be satisfied by every password. There are many plugins to ensure strong passwords.
• A brute force attack works by entering all the permutations and combinations of login credentials. You can minimize the risk by limiting the number of login attempts.
• Implement two-factor authentication to help users leverage two layers of protection. After this, users will get a secret code through SMS or Email to login.

Poor Access Management

One of the major WordPress security risks is improper management of user access. If you don’t properly manage permissions for different users of your WordPress website, it could lead to severe consequences. So, if high level access is given by mistake or without much consideration to a user who might be get hacked, you will face various security challenges.

Proper access management will enable you to allow users who are worth it to access critical data. As a result, it won’t be accidentally or purposely accessed by a user with lower access rights.

Solution:

• You must adopt a robust IAM (Identify and Access Management) framework to protect your sensitive data.
• Check the list of all WordPress accounts regularly and remove those that you no longer need.
• Find out those users who don’t need higher access rights and revoke the unnecessary access rights.
• Shift your organization on the “least privilege principle” or zero-trust architecture, never trust any user and always verify their identity.

XML-RPC Protocol Vulnerability

Initially, WordPress used XML-RPC protocol to establish communication between the CMS and third-party programs. However, in 2015, it started to support REST API. After this, third-party communication is handled by this protocol. However, XML-RPC is still supported in WordPress. Plus, it is enabled by default. It causes vulnerabilities in WordPress.

An attacker can exploit XML-RPC to launch brute force and DDoS attacks. XML-RPC will enable the attacker to check multiple username-password combinations in a single command. Plus, it will enable the attacker to circumvent security measures that prevent brute force.

In the second type of attack, your website can be taken offline with DDoS. An attacker can exploit the pingback feature in XML-RPC, which will overburden your site with excessive requests.

Solution:

• The best way to avoid WordPress security risks arising from XML-RPC is to disable it if you don’t need it.
• You can configure restrictions for it if you plan to use it to avoid potential security risks.
• Strong passwords and access management can also help to mitigate the risks from this type of vulnerability.

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What are the Potential Risks of WordPress Vulnerability?

Since WordPress is used by most website owners that use a CMS, it is on top of the hit list of attackers. Hence, there are different types of security risks that WordPress users are prone to. The following are the most common security risks faced by users of this CMS.

Cross-Site Scripting

XSS or Cross-site Scripting is a common security risk which can result in unauthorized access and compromised data. Plugins are most susceptible to this risk. It enables an attacker to trick users into loading web pages with malicious scripts.

Attackers can dupe users with links to malicious websites and steal their sensitive information. It can be done with insecure plugins and themes. You can avoid such risk by applying respective updates, input validation, encryption, etc.

File Inclusion

PHP is the underlying technology for WordPress. However, it could also be a source of vulnerability in WordPress. It can happen when there is vulnerable code that is used to load external files. The code is vulnerable when the input provided by users is not validated and sanitized.

For example, it could lead to a remote file inclusion attack in which an attacker can attempt to load a malicious file. If there is a successful file inclusion attack, it will allow the attacker to gain access to sensitive data or files like wp-config.php.

Denial-of-Service

Vulnerabilities in WordPress can make your website susceptible to Denial-of-Service or DoS attacks. In this case, an attacker will overwhelm your server with excessive requests, rendering it unresponsive. It could also block administrator permissions, putting your site at risk.

These types of attacks are usually carried out using bots. So, the origin of the traffic is hidden. The attacker can also carry out DDoS attacks by using multiple machines.

SQL Injection

Another WordPress site vulnerability could arise from MySQL, which is the native query language for this CMS. Attackers can leverage SQL injection to get sensitive data, manipulate data in database, or destroy data.

Usually, attackers take advantage of web forms to inject SQL queries. If the input is not validated and sanitized, these queries are executed. Consequently, data can be added, deleted, modified, or disclosed.

Brute Force

Brute-force is the most used technique for unauthorized logins. In this technique, the attacker uses various tools to automate login requests with various combinations of usernames and passwords. The attacker tries billions of username-password combinations to log in to the target site.

Mostly, these attacks happen to WordPress users because, in many cases, the default admin page is easy to find. In many cases, website owners don’t change the admin page and it’s usually found by typing website domain and adding “/wp-admin” at the end. After this, the attacker can try brute-forcing.

Signs Your WordPress Website May Be Compromised

A compromised WordPress website often shows warning signs before a complete security breach occurs. Identifying these indicators early helps prevent data loss, malware infections, SEO damage, and unauthorized access to your website.

• Unexpected Website Redirects: Visitors are redirected to spam, phishing, or malicious websites without any changes made by the administrator.
• Unknown Administrator Accounts: New administrator or editor accounts appear in the WordPress dashboard that were never created by your team.
• Slow Website Performance: Your website suddenly becomes slow due to malicious scripts, unauthorized processes, cryptocurrency miners, or excessive server resource consumption.
• Unwanted Spam Content: Strange pages, blog posts, advertisements, or spam links appear on your website without your knowledge, affecting both users and search engine rankings.
• Google Security Warnings: Search engines display warnings such as "This site may be hacked" or flag your website for malware or phishing activity.
• Unexpected File Changes: Core WordPress files, plugins, themes, or configuration files are modified without any authorized updates or deployments.
• Frequent Login Issues: Legitimate users are locked out, passwords stop working unexpectedly, or unusual login attempts appear in authentication logs.
• Suspicious Server Activity: Your hosting provider reports abnormal CPU usage, excessive outbound traffic, or unusual server processes originating from your website.
• Browser or Antivirus Alerts: Web browsers or antivirus software warn visitors that your website contains malware, phishing pages, or harmful downloads.
• Unauthorized Plugin or Theme Changes: Unknown plugins, themes, or malicious code snippets appear, while existing extensions are modified without approval.
• Unusual Network Traffic: Security logs reveal unexpected API requests, repeated brute force login attempts, or traffic spikes from suspicious IP addresses, indicating potential compromise.

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Why is WordPress Security Important?

WordPress security is indispensable to maintain app’s integrity and validity. Check out key points that cover importance of WordPress below:

Vulnerability Exploitation

WordPress sites are generally targeted for vulnerabilities in the core software, plugins, or themes. Such exploitation can cause unauthorized access, data breaches, or malware infections. That makes WordPress security a need of an hour.

Data Protection

Many WordPress websites store confidential details which include personal details, financial data, and login credentials. A security breach can lead to the theft or exposure of this data which can cause unbearable consequences for organizations.

Website Integrity

Attackers might deface websites or insert malicious data, which notably damages the website’s goodwill and undermines trust of users. Thus, ensuring security helps maintain the integrity and professionalism of the site.

Operational Disruption

Security breaches can cause significant downtime, affecting website availability and functionality. This can result in a huge loss of business and user frustration. That’s why ensuring robust security of WordPress prevents operational disruptions and financial losses.

Regulatory Compliance

For websites handling personal or financial data, security is generally a regulatory requirement. Ensuring compliance helps avoid legal issues and penalties.

WordPress Website Security Checklist

ZeroThreat for Securing WordPress Websites

Securing a WordPress website requires more than periodic updates and basic security plugins. ZeroThreat helps identify security weaknesses across your WordPress environment through automated, production-safe security testing. It scans core files, plugins, themes, and configurations to uncover vulnerabilities before they become exploitable.

ZeroThreat performs deep security assessments to detect outdated plugins, vulnerable themes, weak passwords, user enumeration issues, misconfigurations, and other common WordPress risks. It also supports MFA-authenticated scanning, allowing protected areas such as the admin dashboard to be tested without compromising security.

Instead of overwhelming teams with excessive alerts, ZeroThreat prioritizes high-risk findings and provides actionable remediation guidance. Its intelligent testing minimizes false positives, helping developers and security teams focus on vulnerabilities that have the greatest security impact and require immediate attention.

Built for modern development workflows, ZeroThreat delivers fast, continuous security testing with zero configuration. It supports compliance reporting, secure scan location selection, and rapid vulnerability validation, enabling organizations to strengthen WordPress security while reducing manual testing effort and accelerating remediation.

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Wrapping Up

WordPress can be a secure platform when security is treated as an ongoing process rather than a one-time task. Keeping the core, plugins, and themes updated while following security best practices significantly reduces your website's attack surface and overall risk.

Understanding common WordPress vulnerabilities and recognizing early signs of compromise helps you respond before attackers cause serious damage. Regular vulnerability assessments, secure configurations, strong authentication, and continuous monitoring are essential for maintaining a resilient and trustworthy website.

For organizations that want to simplify WordPress security, ZeroThreat provides automated, production-safe security testing that identifies real vulnerabilities with actionable remediation guidance. So, start your free scan today and see exactly where your site stands.