
Custom CSS and JavaScript Security & Risk Analysis
wordpress.org/plugins/custom-css-and-javascriptEasily add custom CSS and JavaScript code to your WordPress site, with draft previewing, revisions, and minification!
Is Custom CSS and JavaScript Safe to Use in 2026?
Generally Safe
Score 92/100Custom CSS and JavaScript has no known CVEs and is actively maintained. It's a solid choice for most WordPress installations.
The "custom-css-and-javascript" plugin version 2.0.16 exhibits a generally good security posture with several positive indicators. The absence of known CVEs and a clean vulnerability history, combined with the use of prepared statements for all SQL queries and robust output escaping in most instances, suggests a commitment to secure coding practices. The plugin also implements a healthy number of nonce and capability checks, further strengthening its defenses. However, a significant concern arises from the presence of one AJAX handler that lacks authentication checks. This unprotected entry point presents a clear attack vector that could be exploited to perform unauthorized actions, even if the overall attack surface is relatively small. While the taint analysis shows no critical or high severity unsanitized flows, the unprotected AJAX handler remains a notable weakness.
Key Concerns
- Unprotected AJAX handler found
- Moderate percentage of output not properly escaped
Custom CSS and JavaScript Security Vulnerabilities
Custom CSS and JavaScript Code Analysis
SQL Query Safety
Output Escaping
Data Flow Analysis
Custom CSS and JavaScript Attack Surface
AJAX Handlers 7
WordPress Hooks 8
Maintenance & Trust
Custom CSS and JavaScript Maintenance & Trust
Maintenance Signals
Community Trust
Custom CSS and JavaScript Alternatives
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wp-add-custom-css
Add custom css to the whole website and to specific posts and pages.
Better WordPress Minify
bwp-minify
Allows you to combine and minify your CSS and JS files to improve page load time.
Custom CSS and JS
custom-css-and-js
Custom CSS and JavaScript allows you to add custom internal and external CSS and JavaScripts to individual posts.
Custom JS
custom-js
Custom JS is easy to use. Custom JS WordPress plugin allows you to Custom JS fields in your theme - include js in head or footer.
Custom CSS for WordPress
custom-css-wp
The Easy and Lightweight Plugin to add custom CSS to your wordpress website. This plugin will help you to override Theme or Plugin CSS.
Custom CSS and JavaScript Developer Profile
21 plugins · 40K total installs
How We Detect Custom CSS and JavaScript
Patterns used to identify this plugin on WordPress sites during automated security audits and web crawling.
Asset Fingerprints
/wp-content/plugins/custom-css-and-javascript/codemirror/codemirror.js/wp-content/plugins/custom-css-and-javascript/codemirror/mode/css.js/wp-content/plugins/custom-css-and-javascript/codemirror/mode/javascript.js/wp-content/plugins/custom-css-and-javascript/codemirror/addon/dialog/dialog.js/wp-content/plugins/custom-css-and-javascript/codemirror/addon/edit/matchbrackets.js/wp-content/plugins/custom-css-and-javascript/codemirror/addon/search/search.js/wp-content/plugins/custom-css-and-javascript/codemirror/addon/search/searchcursor.js/wp-content/plugins/custom-css-and-javascript/codemirror/addon/search/match-highlighter.js+9 more/index.php?hm_custom_js_draft=1/index.php?hm_custom_css_draft=1/wp-content/uploads/hm_custom_css_js/custom.js/wp-content/uploads/hm_custom_css_js/custom.csshm_custom_js_draft=1hm_custom_css_draft=1HTML / DOM Fingerprints
pp_custom_css_js_config