Slim SEO – AI SEO Plugin, Lightweight, Fast & Automated

83 Quality Score

Active Installs

22/30

With 60,000 active installs, Slim SEO sits well behind the major players like Yoast and Rank Math but has carved out a respectable niche among users who prefer minimalism.

Update Freshness

25/25

The plugin was last updated in July 2026 and tested with WordPress 7.0.1, indicating active development and current compatibility.

User Rating

14/15

A 94 out of 100 rating from 136 reviewers shows consistently strong user satisfaction, especially given the smaller user base.

Support Health

8/15

With only 4 support threads total, it is hard to draw firm conclusions, though all 4 were resolved which suggests responsive maintenance.

WP Compatibility

15/15

Full marks here, requiring only PHP 7.4 and WordPress 6.6, making it compatible with the vast majority of hosting environments.

Scores higher than 92% of indexed plugins

About

An AI SEO plugin for WordPress that's lightweight and fast. Automatically generates meta tags, sitemaps, schemas and more with no bloat.

Active Installs 70k+

Rating ★★★★½ 4.7/5

Last Updated 2026-09-07 8:39am GMT

Requires WordPress 6.6+

Tested Up To 7.1

Requires PHP 7.4+

Security History

6 known vulnerabilities, all patched

6 Medium

Most recent: September 11, 2026

View details ▸

Slim SEO – AI SEO Plugin, Lightweight, Fast & Automated <= 4.10.0 - Authenticated (Contributor+) Insecure Direct Object Reference Medium

September 11, 2026 Patched in ["4.10.1"] CVE-2026-62113

Slim SEO <= 4.9.10 - Insecure Direct Object Reference to Authenticated (Contributor+) Arbitrary Post Meta Disclosure Medium

August 3, 2026 Patched in ["4.9.11"] CVE-2026-16957

Slim SEO <= 4.9.8 - Authenticated (Contributor+) Insufficient Authorization to Private Content Disclosure via 'object.ID' Parameter Medium

June 30, 2026 Patched in ["4.9.9"] CVE-2026-12408

Slim SEO – A Fast & Automated SEO Plugin For WordPress <= 4.6.2 - Missing Authorization Medium

June 25, 2026 Patched in ["4.7.0"] CVE-2026-57429

Slim SEO <= 4.5.4 - Authenticated (Administrator+) SQL Injection Medium

June 12, 2025 Patched in ["4.5.5"] CVE-2025-49854

Slim SEO <= 4.5.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via slim_seo_breadcrumbs Shortcode Medium

May 20, 2025 Patched in ["4.5.4"] CVE-2025-4611

What It Does

Slim SEO is a lightweight WordPress plugin that automatically generates meta titles, descriptions, XML sitemaps, schema markup, and redirect management without requiring manual configuration for each post. It activates sensible defaults for most SEO needs while remaining fast and unobtrusive on the frontend and admin.

Who It's For

This plugin is best for bloggers, small business owners, and developers who want solid SEO basics without the overhead of larger suites. It fits sites that prioritize speed and simplicity over deep content analysis, readability scoring, or keyword optimization guidance.

Who Should Skip It

Users who want real-time content readability scoring, detailed keyword suggestions, internal link recommendations, or AI-driven SEO insights should skip this plugin and choose Yoast SEO, Rank Math, or All in One SEO instead.

The Bottom Line

Slim SEO earns an 83 out of 100 quality score by delivering a focused, fast, and well-maintained plugin that handles the SEO essentials without bloat. It is a strong choice for minimalist site owners but lacks the depth and content guidance that power users expect from premium SEO suites.

Related Plugins

Yoast SEO 98/100

Pick Yoast if you want real-time readability analysis, extensive content guidance, and a massive ecosystem of integrations.

All in One SEO 98/100

Choose AIOSEO for built-in local SEO, WooCommerce support, and smart schema generation without extra configuration.

WPCode 98/100

WPCode is a better fit when you mainly need to insert header and footer code snippets rather than full SEO functionality.

Rank Math SEO 97/100

Rank Math is the stronger option if you want free access to features like multiple keyword tracking, schema generators, and AI tools.

LiteSpeed Cache 95/100

LiteSpeed Cache is the right pick when your priority is performance optimization on LiteSpeed servers rather than SEO metadata management.