Image optimization plugins process files that become part of nearly every public page. Compression, format conversion, lazy loading, and CDN delivery all need careful handling of uploads, metadata, and generated URLs. Smush – Image Optimization, Compression, Lazy Load, WebP & CDN version 4.2.0 has successfully completed the CleanTalk Plugin Security Certification process and received PSC-2026-64676, confirming that the plugin was reviewed from a secure code perspective with attention to image processing inputs, media permissions, generated formats, remote delivery settings, and public markup.
| Name of | Smush – Image Optimization, Compression, Lazy Load, WebP & CDN |
| Version | 4.2.0 |
| Active installations | 1,000,000+ |
| Description | Optimizes WordPress images with compression, resizing, lazy loading, WebP and AVIF formats, and optional CDN delivery. |
| Security | Successfully tested for: SQL Injection (SQLi) Cross-Site Scripting (XSS) – Stored and 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 | Use Smush – Image Optimization, Compression, Lazy Load, WebP & CDN with confidence backed by the “Plugin Security Certification” (PSC). Keep image processing services and WordPress components current, and verify media output after changing delivery settings. |
| Plugin Security Certification by CleanTalk |  |
| Logo of the plugin |  |
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Key Features
Smush – Image Optimization, Compression, Lazy Load, WebP & CDN optimizes images through compression, resizing, lazy loading, modern image formats, and CDN options. These tools operate around the WordPress media library and affect stored files, attachment metadata, generated image sizes, front-end markup, and remote delivery configuration. Administrators can apply optimization to existing media and control how future uploads are processed.
Security Assurance
The CleanTalk Plugin Security Certification evaluation focused on authorization for media operations, validation of image processing requests, safe construction of generated file paths, and escaping of settings used in public markup. The review also considered bulk actions, remote service configuration, attachment identifiers, and the separation between public image delivery and privileged media management.
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 and 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
Conclusion
With PSC-2026-64676, Smush – Image Optimization, Compression, Lazy Load, WebP & CDN version 4.2.0 demonstrates strong baseline security for image optimization and delivery workflows. Its handling of media actions, generated formats, and front-end image output was reviewed with common WordPress attack paths in mind. Site owners should maintain reliable backups of original media and review generated image behavior after changing CDN or format settings.
Note: The date and certification information may change over time. It is advisable to verify the latest details on the plugin developer’s website.
