WP Fastest Cache (v1.4.6) is a performance-focused WordPress caching and optimization plugin built to reduce server load, accelerate page delivery, and improve real-world metrics like Google PageSpeed and Core Web Vitals—and now it has also proven its security posture by successfully earning CleanTalk’s Plugin Security Certification (PSC-2026-64606), confirming that speed gains don’t come at the cost of safe code, safe defaults, and hardened behavior in high-traffic environments.
| Name of | WP Fastest Cache |
| Version | 1.4.6 |
| Downloads | 1 000 000+ |
| Description | The simplest and fastest WP Cache system |
| Security | Successfully tested for: SQL Injection (SQLi) Cross-Site Scripting (XSS) – Stored & Reflected Cross-Site Request Forgery (CSRF) Authentication Vulnerabilities Authentication Bypass Exploits Privilege Escalation Buffer Overflow Denial-of-Service (DoS) vectors Data Leakage Vulnerabilities Insecure Dependency Usage Remote Code Execution (RCE) Risks Unauthorized File Access Insufficient Injection Protection Information Disclosure via Misconfigured Endpoints |
| CleanTalk Certification | Proudly earned the “Plugin Security Certification” (PSC) from CleanTalk, indicating adherence to stringent security standards. |
| Additional Information | Users can confidently manage age restrictions with the assurance of the “Plugin Security Certification” (PSC). Verify the latest details on the plugin developer’s website. |
| Plugin Security Certification by CleanTalk |  |
| Logo of the plugin |  |
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Key Features
Fast caching core (built for production): WP Fastest Cache uses mod_rewrite for high-speed delivery when available, generating static HTML to reduce PHP execution and database load, and automatically invalidates cache when posts/pages are published so visitors don’t see stale content.
Granular cache controls (site-wide and per-page): You can configure cache behavior for mobile devices, logged-in users, and apply cache timeout rules globally or for specific pages. You can also exclude pages and user agents, which is critical when balancing caching with authenticated sessions, checkout flows, or dynamic content.
Preload and automation: The Preload Cache option builds cache for the entire site automatically, improving first-visit performance (and helping avoid “cold-cache” delays after purges). WP-CLI support for cache clearing also helps teams automate cache operations safely in DevOps pipelines.
CDN and Cloudflare integration: The plugin supports CDN URL rewriting for static assets and includes Cloudflare cache purge via API, enabling coordinated cache invalidation across both WordPress and edge caching—an operational feature that prevents mismatched cache layers and “phantom” stale pages.
Proxy cache support (Varnish): Built-in Varnish cache clearing reduces the operational risk of serving outdated content behind a reverse proxy, keeping cache layers aligned when content changes.
Performance optimization toolkit: Beyond page caching, WP Fastest Cache includes features like HTML/CSS minification, Gzip compression, browser caching, Expires headers, Combine CSS/JS, and Disable Emoji to reduce payload and requests. Premium options extend this with minify JS, defer/delay JS, lazy load, WebP conversion, and database cleanup—helping improve performance without requiring multiple overlapping optimization plugins.
Compatibility-first design: It’s designed to coexist with major plugins (e.g., Contact Form 7, WooCommerce, Elementor, Yoast, etc.), and it explicitly recommends avoiding running multiple caching plugins simultaneously—an important operational best practice to prevent conflicting rulesets and unpredictable behavior.
Security Assurance
Certified with CleanTalk PSC-2026-64606: WP Fastest Cache v1.4.6 has passed the CleanTalk Plugin Security Certification process, meaning its codebase and behavior were reviewed against high-impact web risk categories and confirmed to meet secure plugin expectations for real-world WordPress deployments.
The plugin has been successfully tested for:
✅ Information Leakage Vulnerabilities
✅ SQL Injection Vulnerabilities
✅ Cross-Site Scripting (XSS) Attacks
✅ Cross-Site Request Forgery (CSRF) Attacks
✅ Authentication & Authentication Bypass Vulnerabilities
✅ Privilege Escalation Vulnerabilities
✅ Buffer Overflow Vulnerabilities
✅ Denial-of-Service (DoS) Vulnerabilities
✅ Data Leakage Vulnerabilities
✅ Insecure Dependencies
✅ Code Execution Vulnerabilities
✅ File Unauthorized Access Vulnerabilities
✅ Insufficient Injection Protection
Why this matters specifically for caching plugins: caching layers can unintentionally amplify security mistakes (e.g., caching personalized content, leaking authenticated pages, reflecting unsafe parameters, or exposing internal endpoints through misconfiguration). PSC verification is especially valuable here because it signals that the plugin’s caching/optimization logic and admin-facing controls were evaluated with security boundaries in mind—capabilities, request handling, and safe interaction patterns—so performance tuning doesn’t become a new attack surface.
Conclusion
WP Fastest Cache v1.4.6 delivers the practical performance stack WordPress sites need—page caching, minification, compression, CDN/proxy coordination, and automation hooks—while also demonstrating a verified security posture through CleanTalk’s Plugin Security Certification (PSC-2026-64606), making it a strong choice for site owners and teams who want measurable speed improvements with confidence that the optimization layer remains hardened.
Note: The date and certification information may change over time. It is advisable to verify the latest details on the plugin developer’s website.