
Modular Custom CSS Security & Risk Analysis
wordpress.org/plugins/modular-custom-cssWordPress core provides custom CSS functionality in the customizer that's specific to the current theme; you can switch themes freely with each t …
Is Modular Custom CSS Safe to Use in 2026?
Generally Safe
Score 92/100Modular Custom CSS has no known CVEs and is actively maintained. It's a solid choice for most WordPress installations.
The "modular-custom-css" plugin version 2.1 demonstrates a strong security posture in several key areas. The absence of any AJAX handlers, REST API routes, shortcodes, or cron events significantly limits its attack surface. Furthermore, the plugin's code signals show no dangerous functions, no raw SQL queries (all using prepared statements), and no file operations or external HTTP requests. This indicates a conscious effort to avoid common plugin vulnerabilities. The vulnerability history being completely clear of any recorded CVEs further reinforces this positive assessment. However, a significant concern arises from the output escaping. With two total outputs analyzed and 0% properly escaped, there is a high risk of Cross-Site Scripting (XSS) vulnerabilities. This lack of output sanitization is a critical weakness that could allow attackers to inject malicious scripts into the website, impacting users who interact with the affected output. While the plugin is strong in preventing certain types of attacks, the unescaped output represents a notable vulnerability that needs immediate attention.
Key Concerns
- Unescaped output detected
Modular Custom CSS Security Vulnerabilities
Modular Custom CSS Code Analysis
Output Escaping
Modular Custom CSS Attack Surface
WordPress Hooks 3
Maintenance & Trust
Modular Custom CSS Maintenance & Trust
Maintenance Signals
Community Trust
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Modular Custom CSS Developer Profile
27 plugins · 24K total installs
How We Detect Modular Custom CSS
Patterns used to identify this plugin on WordPress sites during automated security audits and web crawling.
Asset Fingerprints
/wp-content/plugins/modular-custom-css/modular-custom-css-preview.js/wp-content/plugins/modular-custom-css/modular-custom-css-preview.js