Really Simple SSL Pro 9.8.3 – SSL, Security Headers & Hardening Plugin

Description

Switching a site to HTTPS is rarely just a certificate: there are hard-coded http links, insecure scripts and missing redirects. The free Really Simple SSL fixes most of that on activation; Pro finds and fixes the leftovers with a mixed-content scan and back-end fixer.

From there Pro works as a security plugin: HSTS with preload submission, a full set of HTTP security headers including Content Security Policy, two-factor authentication, login limiting, vulnerability detection and hardening switches. Version 9.8.3, released 23 September 2026.

Key features

• Mixed content scan with one-click fixes, including the admin area
• HSTS with preload list submission and 301 redirect handling
• Security headers: CSP, X-Frame-Options, Permissions-Policy and more
• Two-factor authentication and limit login attempts
• Vulnerability detection for installed plugins and themes
• Hardening options such as disabling XML-RPC and user enumeration

Best for

• Sites still showing “not secure” warnings after an SSL install
• Owners who want SSL plus essential security in one plugin
• Agencies standardising HTTPS and headers across client sites

Requirements

• A valid SSL certificate on your hosting
• WordPress 6.x and PHP 7.4+
• The free Really Simple SSL plugin (Pro extends it)

What you get

• The original, unmodified Really Simple SSL Pro plugin files, version 9.8.3 (updated 23 September 2026)
• Released under the GPL licence
• Use it on as many sites as you own or build for clients
• Instant download from your Moryvanta account after checkout

Good to know

• Moryvanta is an independent GPL redistributor and is not affiliated with or endorsed by Really Simple Plugins. Product names and trademarks belong to their owners.
• You receive the Really Simple SSL Pro files and updates under the GPL; the developer’s licence key is not included. If activation or a key is requested during installation, a licence needs to be purchased separately – contact Moryvanta support and we’ll help, through a Moryvanta licence where available or by pointing you to Really Simple Plugins.
• Vulnerability detection pulls its data from the vendor’s servers and may need an active licence to stay current.
• It does not issue SSL certificates beyond the free Let’s Encrypt helper; your host must support it.
• Moryvanta support covers downloading and installing the files.

Frequently asked questions

What is Really Simple SSL Pro?

A WordPress plugin that migrates your site to HTTPS, fixes mixed content, and adds security headers, HSTS, two-factor login and hardening options.

Do I need the free version too?

Yes, Pro is an add-on to the free Really Simple SSL plugin from WordPress.org.

Can it break my site?

Strict headers like CSP can block scripts; Pro has a learning mode so you can review rules before enforcing them.