
Unfiltered MU Security & Risk Analysis
wordpress.org/plugins/unfiltered-muThis WordPress MU/WordPress 3.0 multisite plugin gives blog Administrators and Editors the ability to post whatever HTML they want.
Is Unfiltered MU Safe to Use in 2026?
Generally Safe
Score 85/100Unfiltered MU has no known CVEs and is actively maintained. It's a solid choice for most WordPress installations.
The static analysis of the "unfiltered-mu" plugin v1.3.1 reveals a strong security posture. The plugin exhibits excellent coding practices, with zero identified AJAX handlers, REST API routes, shortcodes, or cron events. This indicates a minimal attack surface and a proactive approach to securing entry points. Furthermore, the code signals are overwhelmingly positive: no dangerous functions were detected, all SQL queries utilize prepared statements, and all identified output is properly escaped. The presence of one capability check, while singular, suggests awareness of access control. Taint analysis also shows no critical or high severity flows, reinforcing the perception of secure code execution. The plugin's vulnerability history is completely clean, with no recorded CVEs of any severity. This lack of past vulnerabilities and the current robust code analysis suggest a well-maintained and secure plugin. However, the analysis indicates a complete absence of specific security mechanisms like nonce checks. While the current attack surface is zero, if any entry points were to be introduced in the future without these checks, it could pose a risk. Overall, "unfiltered-mu" v1.3.1 appears to be a secure plugin, with no immediate threats identified, but attention to future development practices regarding nonce and permission checks is advisable.
Unfiltered MU Security Vulnerabilities
Unfiltered MU Code Analysis
Unfiltered MU Attack Surface
WordPress Hooks 4
Maintenance & Trust
Unfiltered MU Maintenance & Trust
Maintenance Signals
Community Trust
Unfiltered MU Alternatives
Code Embed
simple-embed-code
Code Embed provides a very easy and efficient way to embed code (JavaScript, CSS and HTML) in your posts and pages.
PageView
pageview
Insert an iframe and display an external website directly in a post using just a shortcode.
Pym.js Embeds
pym-shortcode
A WordPress block and shortcode for embedding iframes that are responsive horizontally and vertically, using the NPR Visuals Team's Pym.js.
OS HTML5 Shortcodes
os-html5-shortcodes
Using shortcodes you can easily add HTML codes such as ad codes, javascript, video embedding, etc in your pages, posts or custom posts.
Shortcoder — Create Shortcodes for Anything
shortcoder
Create custom "Shortcodes" easily for HTML, JavaScript, CSS code snippets and use the shortcodes within posts, pages & widgets
Unfiltered MU Developer Profile
12 plugins · 32K total installs
How We Detect Unfiltered MU
Patterns used to identify this plugin on WordPress sites during automated security audits and web crawling.
Asset Fingerprints
HTML / DOM Fingerprints
If you install this plugin in wp-content/plugins, the following code
will add the cap on plugin activation, and remove it on deactivation.
It will be a per-blog setting (the plugin will need to be activated on
each blog you want the unfiltered_html cap).
If you install this plugin in wp-content/mu-plugins, the following code
will add give all admins and all editors on every blog the
unfiltered_html cap. Deleting this plugin will remove the cap.
Don't store in db. Just do a one off mod to the role. Add caps for this page load only: - ^^^^^^^^+1 more