BoundaryGuard Headers enforces modern HTTP security headers to harden your WordPress site against XSS, clickjacking, mixed content, and cross-origin attacks.
Key Features:
- Essential Protection: Adds X-Frame-Options, X-Content-Type-Options, Referrer-Policy, and Permissions-Policy to reduce attack surface and prevent clickjacking.
- HSTS (Strict Transport Security): Forces HTTPS connections to help prevent protocol downgrade and man-in-the-middle attacks.
- Advanced Isolation (COOP/COEP): Enables Cross-Origin-Opener-Policy and Cross-Origin-Embedder-Policy to improve cross-origin isolation and mitigate certain side-channel attacks.
- Content Security Policy (CSP): One of the strongest defenses against XSS. Includes a dashboard-based CSP builder with preset options to whitelist trusted sources for scripts, styles, images, and more.
- CSP Report-Only Mode: Test your policy safely without blocking content.
- Server Header Hardening: Removes or limits exposure of headers such as
X-Powered-By and Server.
- Lightweight and Fast: Uses PHP headers for broad server compatibility and minimal performance impact.
- No
.htaccess Editing Required: Works without modifying server configuration files.
Designed for developers and site owners who want stronger security without unnecessary complexity.