SSL Zen — SSL Certificate Installer & HTTPS Redirects

80 Quality Score

Active Installs

18/30

With 10,000 active installs and a Popularity score of 60/30, adoption is modest compared to category leaders like SSL Insecure Content Fixer at 100,000 installs, suggesting this is a niche choice rather than an industry default.

Update Freshness

25/25

The plugin was last updated on 2026-07-11 and is tested against WordPress 7.0.1, earning a perfect Maintenance score of 100/25, which signals an actively maintained codebase.

User Rating

15/15

A 98/100 rating from 663 users is exceptional and the highest in this category, indicating strong user satisfaction even with a smaller install base.

Support Health

8/15

Support Health is 50/15 because there are 0 tracked support threads with 0% resolution rate, which is a red flag for any user who might need hands-on help with certificate issues.

WP Compatibility

15/15

The Compatibility score is 100/15, with broad support going back to WordPress 4.2 and PHP 5.6, meaning it will run on virtually any modern WordPress install.

Scores higher than 79% of indexed plugins

About

Free SSL certificate for WordPress — install a Let's Encrypt SSL, force HTTPS, fix mixed content and redirect HTTP to HTTPS. No coding needed.

Active Installs 10k+

Rating ★★★★½ 4.9/5

Last Updated 2026-09-18 8:24am GMT

Requires WordPress 4.2+

Tested Up To 7.0.5

Requires PHP 5.6+

Security History

8 known vulnerabilities, all patched

8 Medium

Most recent: September 24, 2026

View details ▸

SSL Zen <= 4.7.42 - Authenticated (Administrator+) Path Traversal to Arbitrary File Read via 'file_name' Parameter Medium

September 24, 2026 Patched in ["4.7.43"] CVE-2026-17602

SSL Zen <= 4.7.42 - Reflected Cross-Site Scripting via 'uri' Parameter Medium

September 24, 2026 Patched in ["4.7.43"] CVE-2026-17577

SSL Zen <= 4.7.42 - Reflected Cross-Site Scripting via 'uri' and 'host' Parameters Medium

September 18, 2026 Patched in ["4.7.43"] CVE-2026-15463

SSL Zen — SSL Certificate Installer & HTTPS Redirects < 4.7.40 - Authenticated (Subscriber+) Information Exposure Medium

September 11, 2026 Patched in ["4.7.40"] CVE-2026-86781

SSL Zen — SSL Certificate Installer & HTTPS Redirects <= 4.7.43 - Reflected Cross-Site Scripting Medium

August 17, 2026 Patched in [] CVE-2026-28569

SSL Zen – Free Let's Encrypt SSL Certificate & HTTPS/SSL Redirect WordPress Plugin <= 4.5.0 - Sensitive Information Exposure Medium

April 17, 2024 Patched in ["4.6.0"] CVE-2024-1076

Freemius SDK <= 2.5.9 - Reflected Cross-Site Scripting via fs_request_get Medium

July 18, 2023 Patched in ["4.5.3"] CVE-2023-33999

Freemius SDK <= 2.4.2 - Missing Authorization Checks Medium

March 4, 2022 Patched in ["4.0.5"] CVE-2022-4974

What It Does

SSL Zen helps WordPress site owners obtain and install a Let's Encrypt SSL certificate through their hosting provider, then forces all site traffic over HTTPS to fix insecure mixed content warnings. It handles the redirect from HTTP to HTTPS and rewrites existing content URLs so nothing breaks after the switch. The goal is a one-click transition to a fully encrypted site without editing wp-config.php or .htaccess manually.

Who It's For

This plugin suits small business owners, bloggers, and non-technical WordPress users who want a free SSL certificate and HTTPS enforcement without touching server files. It works best on shared or managed hosting plans that support automatic Let's Encrypt issuance. Beginners who feel overwhelmed by certificate authority setups will get the most value here.

Who Should Skip It

If your host already provides free auto-renewing Let's Encrypt certificates or you run a managed WordPress host like WP Engine or Kinsta, you do not need this plugin. Developers who prefer manual .htaccess or server-level configuration, or anyone running a multisite network with custom certificate workflows, should look elsewhere.

The Bottom Line

SSL Zen delivers a genuinely user-friendly path to free HTTPS, with a near-perfect rating and modern compatibility that most alternatives cannot match. The weak support presence and lower install count are real concerns for anyone who might get stuck during certificate issuance. For a typical small WordPress site on a compatible host, it is a solid pick; for complex or enterprise setups, the alternatives above offer stronger track records.

Related Plugins

SSL Insecure Content Fixer 84/100

Pick this instead if your host already issued an SSL certificate and you only need to clean up mixed content warnings on existing posts and pages.

WP Force SSL & HTTPS SSL Redirect 84/100

Pick this instead if you want a lightweight redirect-only solution without the certificate installation wizard, especially on hosts with manual SSL setup.

WP Encryption 83/100

Pick this instead if you want a more guided Let's Encrypt workflow with premium support options and better documentation for non-technical users.

Flexible SSL for CloudFlare 83/100

Pick this instead if you use Cloudflare's free tier and need to prevent redirect loops when running Flexible SSL mode in front of WordPress.

Easy HTTPS Redirection (SSL) 82/100

Pick this instead if you want a battle-tested, 100,000-install solution focused purely on forcing HTTPS redirects with minimal configuration overhead.