A Cross-Site Request Forgery (CSRF) attack is a type of attack where a malicious website or attacker tricks a user into performing an action on a website they are currently logged into. In the case of a WordPress site, this could mean tricking a logged-in administrator into performing actions such as creating or deleting posts, or changing settings.

To protect a WordPress site from CSRF attacks, there are several methods that can be used:

  1. Use a security plugin: There are several WordPress security plugins that provide built-in CSRF protection, such as All In One WP Security and Firewall, iThemes Security, and Wordfence Security.
  2. Use a nonce: A nonce (number used once) is a unique, one-time token that can be added to forms and links to protect against CSRF attacks. WordPress automatically generates nonces for forms and links, and you can use the wp_nonce_field() and wp_verify_nonce() functions to add and verify nonces in your forms and links.
  3. Use the Referrer header: By checking the Referrer header, you can ensure that a form or link is being submitted from the same website where it originated.
  4. Use the same-site cookies: By setting the SameSite attribute for cookies, you can prevent them from being sent with cross-site requests.
  5. Use a Content Security Policy (CSP): A CSP is a security feature that helps to detect and mitigate certain types of attacks, including Cross-Site Scripting (XSS) and data injection attacks.

It’s important to note that no single method is foolproof and you should implement multiple methods to ensure the best protection against CSRF attacks. Also, it’s important to keep your website and its plugins up-to-date to ensure that any security vulnerabilities are patched as soon as possible.

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