Overview
All-In-One Security (AIOS) is a popular WordPress security plugin developed by the team behind UpdraftPlus, one of the most widely used WordPress backup plugins. AIOS takes a comprehensive approach to WordPress security, combining a PHP-based firewall with extensive hardening features, all presented through an intuitive interface with a security scoring system.
The firewall operates at the PHP level using .htaccess rules and PHP-based filtering to block common attack patterns. It implements the 6G blacklist firewall rules, which provide broad protection against malicious URL requests, referrers, and user agents. The firewall can be configured in stages, allowing users to progressively enable rules from basic to advanced without breaking site functionality.
AIOS stands out for making security accessible to non-technical WordPress users. Its security strength meter provides a visual score of your site's security posture, and features are clearly categorized by difficulty level. The free version includes virtually all firewall and hardening features, making it one of the most generous free security plugins available.
The Premium version adds malware scanning, two-factor authentication, smart 404 blocking, and country-based IP blocking for sites that need additional protection layers.
Ratings Breakdown
Key Features
PHP Firewall
Application-level firewall with configurable rules that filter malicious requests at the PHP level.
6G Blacklist Firewall
Industry-standard 6G blacklist rules blocking malicious URL patterns, referrers, and user agents via .htaccess.
Login Lockdown
Locks out IP addresses after repeated failed login attempts with configurable thresholds and lockout duration.
Security Strength Meter
Visual scoring system showing your site''s security posture with actionable recommendations for improvement.
File Change Detection
Monitors WordPress core files and alerts when changes are detected that could indicate compromise.
Database Security
Database table prefix changing, scheduled backups, and protection against SQL injection attacks.
Comment Spam Protection
Blocks spam comments using CAPTCHA, honeypot fields, and IP-based filtering.
Pros & Cons
Pros
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Generous free version
Nearly all firewall and hardening features are available for free, making it one of the most feature-rich free security plugins.
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User-friendly interface
Security strength meter and categorized features make it accessible to non-technical WordPress users.
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Comprehensive hardening
Covers user security, filesystem, database, .htaccess, and firewall in one plugin with progressive rule activation.
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From trusted developers
Built by the UpdraftPlus team, known for one of the most reliable WordPress backup plugins.
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Low resource usage
Lightweight .htaccess and PHP-based rules add minimal server overhead compared to heavier security suites.
Cons
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Basic firewall architecture
The PHP-based firewall is less sophisticated than Wordfence''s endpoint firewall or NinjaFirewall''s pre-WordPress approach.
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No real-time threat intelligence
Relies on static rule sets rather than continuously updated threat feeds from global attack data.
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Limited malware scanning (free)
Malware scanning is only available in the Premium version, unlike Wordfence which includes it free.
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.htaccess dependency
Some firewall features depend on .htaccess, which only works on Apache servers and not NGINX.
Pricing
Pricing model: Freemium (Free tier with nearly full features + Premium add-ons)
Free
Complete firewall and hardening features
- PHP-based firewall rules
- 6G blacklist firewall
- .htaccess protection
- Login lockdown
- User account security
- Database security
- Filesystem security
- Comment spam protection
Premium (2 sites)
Advanced security with malware scanning and country blocking
- Everything in Free
- Malware scanning
- Two-factor authentication
- Smart 404 blocking
- Country blocking
- Premium support
Premium (unlimited sites)
Premium features for unlimited WordPress sites
- Everything in Premium
- Unlimited site license
- Priority support
Our Verdict
All-In-One Security lives up to its name by providing one of the most comprehensive free security packages in the WordPress ecosystem. The combination of PHP-based firewall rules, 6G blacklist protection, and extensive hardening features covers most common attack vectors without requiring a premium subscription.
The user interface is particularly well-designed for WordPress beginners. The security strength meter gamifies the hardening process, and the progressive firewall rule activation prevents users from accidentally breaking their sites. For non-technical site owners, AIOS makes security approachable.
Our verdict: The best free WordPress security plugin for users who want comprehensive hardening without paying a premium. While the firewall is less sophisticated than Wordfence or NinjaFirewall, the breadth of free features and user-friendly design make AIOS an excellent starting point for WordPress security.
CVE Coverage
All-In-One Security (AIOS) can detect and block attacks matching 81K+ known CVEs based on its supported rule sets.
Coverage by Attack Type
Latest Blockable CVEs
| CVE | Severity |
|---|---|
| CVE-2026-4510 | MEDIUM |
| CVE-2026-4161 | MEDIUM |
| CVE-2026-4087 | MEDIUM |
| CVE-2026-4086 | MEDIUM |
| CVE-2026-4084 | MEDIUM |
| CVE-2026-4077 | MEDIUM |
| CVE-2026-4072 | MEDIUM |
| CVE-2026-4069 | MEDIUM |
| CVE-2026-4067 | MEDIUM |
| CVE-2026-4022 | MEDIUM |
Frequently Asked Questions
Is AIOS better than Wordfence?
They serve different needs. AIOS provides broader hardening features for free with a simpler interface, making it better for beginners. Wordfence has a more sophisticated endpoint firewall and malware scanner. For pure WAF protection, Wordfence is stronger. For comprehensive free hardening with a user-friendly approach, AIOS is excellent.
Does AIOS work on NGINX servers?
AIOS works on NGINX, but some features that rely on .htaccess rules (like the 6G blacklist firewall) will not function. The PHP-based firewall rules, login lockdown, and most hardening features work regardless of web server. Check the plugin documentation for NGINX-specific guidance.
Can I use AIOS with a caching plugin?
Yes, AIOS is compatible with most WordPress caching plugins. However, if you enable .htaccess-based firewall rules, ensure your caching plugin's .htaccess rules don't conflict. Test your site thoroughly after enabling both to ensure pages load correctly.
Is AIOS related to UpdraftPlus?
Yes, AIOS is developed by Team Updraft, the same team behind UpdraftPlus backup plugin. While they are separate plugins, they complement each other well—AIOS handles security while UpdraftPlus manages backups.
Ready to try All-In-One Security (AIOS)?
Start with the free tier and upgrade as you grow.