WordPress plugin
Custom CSS security & vulnerabilities
Unpatched vulnerability in the latest version
At least one vulnerability affects the latest version and no fix has been released. Deactivate the plugin or restrict access to the affected feature until the vendor ships a patch.
- Critical0
- High0
- Medium1
- Low0
All Custom CSS vulnerabilities
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Custom CSS: common questions
Does Custom CSS have known vulnerabilities?
Yes. VulnCrest Radar lists 1 known vulnerability in Custom CSS: 1 medium. At least one is not fixed in the latest version.
How do I check which version of Custom CSS I run?
In wp-admin open Plugins → Installed Plugins; the version is shown under the name. Without admin access, our passive Check my site tool can often read it from public files.
What is the most recent Custom CSS vulnerability?
CVE-2025-48096, published Oct 8, 2025: Custom CSS <= 1.4.0 - Missing Authorization. Severity: Medium (CVSS 5.3).
Is any Custom CSS vulnerability listed in CISA KEV?
No. None of the known Custom CSS vulnerabilities is currently listed in the CISA KEV catalog.