
Asynchronous Javascript Security & Risk Analysis
wordpress.org/plugins/asynchronous-javascriptImprove page load performance by asynchronously loading javascript using head.js
Is Asynchronous Javascript Safe to Use in 2026?
Use With Caution
Score 63/100Asynchronous Javascript has 1 unpatched vulnerability. Evaluate alternatives or apply available mitigations.
The "asynchronous-javascript" plugin version 1.3.5 exhibits a mixed security posture. On the positive side, the static analysis reveals no discernible attack surface in terms of AJAX handlers, REST API routes, shortcodes, or cron events. Furthermore, all identified SQL queries are correctly using prepared statements, and there are no direct file operations or external HTTP requests, which are common vectors for vulnerabilities. However, a significant concern arises from the complete lack of output escaping, meaning any data rendered to the user interface is potentially vulnerable to Cross-Site Scripting (XSS) attacks. The absence of nonce and capability checks on any potential (though seemingly absent) entry points is also a weakness.
The vulnerability history is particularly alarming. The plugin has a known medium severity CVE related to Cross-site Scripting, and critically, this vulnerability is currently unpatched. This indicates a recurring security issue within the plugin that has not been adequately addressed. The existence of this unpatched vulnerability, coupled with the complete lack of output escaping in the current code, strongly suggests that XSS vulnerabilities are a persistent and unresolved problem for this plugin. While the current code analysis doesn't reveal immediate entry points, the historical context and output escaping issues present a clear and present danger.
Key Concerns
- Unpatched CVE
- No output escaping
- Missing nonce checks
- Missing capability checks
Asynchronous Javascript Security Vulnerabilities
CVEs by Year
Severity Breakdown
1 total CVE
Asynchronous Javascript <= 1.3.5 - Reflected Cross-Site Scripting
Asynchronous Javascript Code Analysis
Output Escaping
Asynchronous Javascript Attack Surface
WordPress Hooks 5
Maintenance & Trust
Asynchronous Javascript Maintenance & Trust
Maintenance Signals
Community Trust
Asynchronous Javascript Alternatives
Async JS and CSS
async-js-and-css
Converts render-blocking CSS and JS files into NON-render-blocking, improving performance of web page.
Head.WP
headwp
Head.js is a script to asynchronously load and manage dependencies of javascript and CSS assets.
AJAX Loading
ajax-loading
This plugin improves your users page experience without reloading pages using AJAX.
WP HeadJS
wp-headjs
Uses HeadJS to load your enqueued scripts asynchronously, in parallel, executing them in order.
Async JavaScript
async-javascript
Async Javascript lets you add 'async' or 'defer' attribute to scripts to exclude to help increase the performance of your WordPres …
Asynchronous Javascript Developer Profile
2 plugins · 300 total installs
How We Detect Asynchronous Javascript
Patterns used to identify this plugin on WordPress sites during automated security audits and web crawling.
Asset Fingerprints
/wp-content/plugins/asynchronous-javascript/js/head.load.min.js