S3 Image Optimizer Security & Risk Analysis
wordpress.org/plugins/s3-image-optimizerCompress images in Amazon S3 buckets using lossless and lossy optimization methods via the EWWW Image Optimizer.
Is S3 Image Optimizer Safe to Use in 2026?
Generally Safe
Score 100/100S3 Image Optimizer has no known CVEs and is actively maintained. It's a solid choice for most WordPress installations.
The "s3-image-optimizer" v3.0.0 plugin exhibits a mixed security posture. While the plugin boasts a clean vulnerability history with no recorded CVEs and a seemingly zero attack surface in terms of entry points (AJAX, REST API, shortcodes, cron), this is countered by significant concerns within its code analysis. The most alarming findings are the two "high" severity taint flows with unsanitized paths, indicating a potential for attackers to inject malicious data that could lead to unauthorized file access or manipulation. Furthermore, a low percentage of output escaping (13%) suggests a risk of cross-site scripting (XSS) vulnerabilities if user-supplied data is not properly handled before being displayed.
Key Concerns
- High severity taint flows with unsanitized paths
- Low output escaping percentage
- No capability checks
- No nonce checks
- Bundled Guzzle library (potential for outdated version)
S3 Image Optimizer Security Vulnerabilities
S3 Image Optimizer Release Timeline
S3 Image Optimizer Code Analysis
Bundled Libraries
SQL Query Safety
Output Escaping
Data Flow Analysis
S3 Image Optimizer Attack Surface
Maintenance & Trust
S3 Image Optimizer Maintenance & Trust
Maintenance Signals
Community Trust
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S3 Image Optimizer Developer Profile
5 plugins · 1.4M total installs
How We Detect S3 Image Optimizer
Patterns used to identify this plugin on WordPress sites during automated security audits and web crawling.
Asset Fingerprints
/wp-content/plugins/s3-image-optimizer/jquery-ui-1.10.1.custom.css/wp-content/plugins/s3-image-optimizer/s3io.jss3-image-optimizer/s3io.js?ver=s3-image-optimizer/jquery-ui-1.10.1.custom.css?ver=HTML / DOM Fingerprints
s3io_vars