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Preventing CSRF in WordPress Plugins

Stop cross-site request forgery using nonces on forms, links, AJAX, and REST where appropriate.

Preventing CSRF in WordPress Plugins — a practical guide to WordPress CSRF nonce with clear examples you can reuse in real projects.

WordPress Plugin Development Series (72/95). Prefer one article? Read the complete WordPress plugin development tutorial.

Short description

CSRF tricks a logged-in browser into submitting requests. Nonces + same-site practices reduce this risk.

CSRF protection

check_admin_referer('acme_update');
// or for GET actions:
wp_verify_nonce(sanitize_text_field(wp_unslash($_GET['_wpnonce'] ?? '')), 'acme_delete');

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