Simple Custom CSS and JS

WordPress plugin · custom-css-js · WordPress.org ↗

Latest v3.54 Last release Aug 20, 2026 Tested up to WP 7.1.2 600,000+ active installs

Critical

High

Known total

Unfixed

Running Simple Custom CSS and JS on your site? WP Alerts checks your installed version against every entry below and emails you only when one affects you. Free, no tracking.

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Severity	Vulnerability	Affected	Fixed in	CVE	Published
MEDIUM CVSS 6.1	Simple Custom CSS and JS [custom-css-js] < 3.4 WPVulnerability	< 3.4	v3.4	CVE-2017-2285	Jul 24, 2017

Data aggregated from WPVulnerability, NVD/NIST, ENISA EUVD, CVE.org and WordPress.org. Provided as-is; verify with the plugin author before acting. Disclaimer.