Plugin Security Best Practices — a practical guide to WordPress plugin security with clear examples you can reuse in real projects.
WordPress Plugin Development Series (71/95). Prefer one article? Read the complete WordPress plugin development tutorial.
Short description
Security is not one function — combine authorization, authentication intent checks, input hygiene, and safe output.
Security pillars
1. Capability checks
2. Nonces for state changes
3. Sanitize/validate input
4. Escape output
5. Prepared SQL
6. Least privilege