Simple CSS Security & Risk Analysis

wordpress.org/plugins/simple-css

Add CSS to your website through an admin editor, the Customizer or a metabox for page/post specific CSS.

80K active installs v1.1.1 PHP + WP 4.0+ Updated Sep 15, 2025
csscss-customizercustom-csssimple-csssimple-custom-css
100
A · Safe
CVEs total0
Unpatched0
Last CVENever
Safety Verdict

Is Simple CSS Safe to Use in 2026?

Generally Safe

Score 100/100

Simple CSS has no known CVEs and is actively maintained. It's a solid choice for most WordPress installations.

No known CVEs Updated 6mo ago
Risk Assessment

The simple-css plugin v1.1.1 exhibits a strong security posture based on the provided static analysis. The absence of any identified AJAX handlers, REST API routes, shortcodes, or cron events significantly limits the plugin's attack surface. Furthermore, the code signals indicate good security practices, with all SQL queries using prepared statements and the presence of nonce and capability checks. The lack of dangerous functions, file operations, and external HTTP requests also contributes to a secure design.

The vulnerability history for this plugin is clean, with no recorded CVEs. This suggests a consistent focus on security by the developers or a history of successful vulnerability mitigation. The taint analysis showing no unsanitized paths further reinforces the impression of well-handled input and output sanitization. While the output escaping is not perfect (60% proper), the overall picture is one of a robustly secured plugin with minimal potential for exploitation based on this data.

Key Concerns

  • Partial output escaping
Vulnerabilities
None known

Simple CSS Security Vulnerabilities

No known vulnerabilities — this is a good sign.
Code Analysis
Analyzed Mar 16, 2026

Simple CSS Code Analysis

Dangerous Functions
0
Raw SQL Queries
0
0 prepared
Unescaped Output
4
6 escaped
Nonce Checks
1
Capability Checks
1
File Operations
0
External Requests
0
Bundled Libraries
0

Output Escaping

60% escaped10 total outputs
Attack Surface

Simple CSS Attack Surface

Entry Points0
Unprotected0
WordPress Hooks 7
actionadmin_menusimple-css.php:16
actionadmin_initsimple-css.php:51
actioncustomize_registersimple-css.php:149
actioncustomize_preview_initsimple-css.php:185
actionwp_headsimple-css.php:206
actionadd_meta_boxessimple-css.php:237
actionsave_postsimple-css.php:285
Maintenance & Trust

Simple CSS Maintenance & Trust

Maintenance Signals

WordPress version tested6.8.5
Last updatedSep 15, 2025
PHP min version
Downloads552K

Community Trust

Rating98/100
Number of ratings60
Active installs80K
Developer Profile

Simple CSS Developer Profile

Tom

9 plugins · 890K total installs

72
trust score
Avg Security Score
90/100
Avg Patch Time
166 days
View full developer profile
Detection Fingerprints

How We Detect Simple CSS

Patterns used to identify this plugin on WordPress sites during automated security audits and web crawling.

Asset Fingerprints

Asset Paths
/wp-content/plugins/simple-css/js/codemirror.js/wp-content/plugins/simple-css/js/css.js/wp-content/plugins/simple-css/css/codemirror.css/wp-content/plugins/simple-css/css/ambiance.css/wp-content/plugins/simple-css/css/style.css/wp-content/plugins/simple-css/js/live-preview.js
Script Paths
/wp-content/plugins/simple-css/js/codemirror.js/wp-content/plugins/simple-css/js/css.js/wp-content/plugins/simple-css/js/live-preview.js

HTML / DOM Fingerprints

CSS Classes
simple-css-containersimple-css-sidebar
Data Attributes
data-theme
FAQ

Frequently Asked Questions about Simple CSS