1. Brute force attacks: In this type of attack, hackers try to guess the username and password of a WordPress site by using automated scripts or tools. They use a common username and password combinations and dictionary words to try to gain access.

2. SQL Injection attacks: Hackers can use SQL injection attacks to insert malicious code into the WordPress database, which can allow them to take control of the website or steal sensitive information.

3. Cross-site scripting (XSS) attacks: XSS attacks involve injecting malicious scripts into a website, which can be used to steal user data, redirect users to malicious websites, or even take control of the website.

4. Denial of Service (DoS) attacks: These attacks involve overwhelming a website with traffic, which can cause the site to crash or become unavailable to legitimate users.

5. Malware attacks: Hackers can infect WordPress websites with malware, which can be used to steal user data, install backdoors, or take control of the website.

WordPress site owners need to take steps to protect their websites from these types of attacks, such as using strong passwords, keeping WordPress and plugins up-to-date, and using security plugins and services.