Insert JavaScript and CSS Security & Risk Analysis

wordpress.org/plugins/insert-javascript-css

Adds fields to the post and page edit pages that allow you to insert custom JavaScript or CSS for that post or page.

400 active installs v0.2 PHP + WP 3.0+ Updated Jul 26, 2012
cssjavascriptpagepost
85
A · Safe
CVEs total0
Unpatched0
Last CVENever
Safety Verdict

Is Insert JavaScript and CSS Safe to Use in 2026?

Generally Safe

Score 85/100

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

No known CVEs Updated 13yr ago
Risk Assessment

The "insert-javascript-css" v0.2 plugin presents a mixed security posture. On the positive side, the static analysis indicates a lack of direct attack surface through AJAX, REST API, shortcodes, or cron events. Furthermore, all SQL queries are properly prepared, and there are no recorded vulnerabilities (CVEs), which suggests good development practices regarding external threats. However, a significant concern arises from the complete absence of output escaping for all identified output points. This means that any data processed or displayed by the plugin could potentially be rendered directly in the user's browser without sanitization, opening the door to cross-site scripting (XSS) vulnerabilities. While the plugin doesn't appear to have a history of known vulnerabilities, the lack of output escaping is a fundamental security oversight that could be exploited.

Key Concerns

  • Unescaped output detected
Vulnerabilities
None known

Insert JavaScript and CSS Security Vulnerabilities

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

Insert JavaScript and CSS Code Analysis

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

Output Escaping

0% escaped6 total outputs
Attack Surface

Insert JavaScript and CSS Attack Surface

Entry Points0
Unprotected0
WordPress Hooks 7
actionadmin_headinsert-javascript-css.php:27
actionadmin_print_stylesinsert-javascript-css.php:30
actionpost_submitbox_misc_actionsinsert-javascript-css.php:32
actionsave_postinsert-javascript-css.php:33
actionthe_postsinsert-javascript-css.php:34
actionwp_headinsert-javascript-css.php:38
actionmedia_buttons_contextinsert-javascript-css.php:153
Maintenance & Trust

Insert JavaScript and CSS Maintenance & Trust

Maintenance Signals

WordPress version tested3.4.2
Last updatedJul 26, 2012
PHP min version
Downloads27K

Community Trust

Rating82/100
Number of ratings10
Active installs400
Developer Profile

Insert JavaScript and CSS Developer Profile

Ryan

3 plugins · 420 total installs

84
trust score
Avg Security Score
85/100
Avg Patch Time
30 days
View full developer profile
Detection Fingerprints

How We Detect Insert JavaScript and CSS

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

Asset Fingerprints

Asset Paths
/wp-content/plugins/insert-javascript-css/js/ijsc.js/wp-content/plugins/insert-javascript-css/css/ijsc.css
Script Paths
/wp-content/plugins/insert-javascript-css/js/ijsc.js

HTML / DOM Fingerprints

CSS Classes
ijsc-viewijsc-insertJSijsc-insertCSSijsc-helpijsc-js-message
Data Attributes
data-childdata-colordata-bwdata-editdata-insert
JS Globals
ijsc.initPostPage
FAQ

Frequently Asked Questions about Insert JavaScript and CSS