WooCommerce Security Best Practices — a practical guide to WooCommerce plugin security with clear examples you can reuse in real projects.
WooCommerce Plugin Development Series (80/101). Prefer one article? Read the complete WooCommerce plugin development tutorial.
Short description
Least privilege, nonces, escaping, prepared SQL, and never trust client-side price totals.
Security pillars
Caps + nonces
Sanitize/validate
Escape output
Server-side totals
Secrets not in JS