Known vulnerabilities in Simple Custom CSS and JS

Easily add Custom CSS or JS to your website with an awesome editor.

1Reported vulnerabilities

6.1Highest CVSS score

3.53Latest version

600,000+Active installs

What to do now

Update Simple Custom CSS and JS to 3.4 or later. 1 of these have a fixed version available. Updating resolves them.

Plugin last updated: May 20, 2026 / Tested up to WordPress: 7.0.4 / View on wordpress.org

Reported vulnerabilities

Ordered by how urgently they need attention — whether a vulnerability is actually being exploited, and how likely exploitation is, rather than CVSS severity alone.

CVE	Severity	Exploit probability next 30 days	Affected versions	Fixed in	Published
CVE-2017-2285	Medium 6.1	1.5%	3.3 and earlier	`3.4`	July 24, 2017

Sources: vulnerability records from NVD, exploitation from CISA KEV, exploit probability from EPSS. Affected versions come from CPE ranges or from the reporting CNA.