Description
The Automatic.css plugin for WordPress is vulnerable to Stored Cross-Site Scripting via REQUEST_URI in all version 4.0.0 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that will execute whenever an administrator accesses the Activity Log settings page.
References6
- automaticcss.com/changelogs/
- plugins.trac.wordpress.org/browser/automaticcss-plugin/trunk/cl…
- plugins.trac.wordpress.org/browser/automaticcss-plugin/trunk/cl…
- plugins.trac.wordpress.org/browser/automaticcss-plugin/trunk/cl…
- plugins.trac.wordpress.org/browser/automaticcss-plugin/trunk/cl…
- www.wordfence.com/threat-intel/vulnerabilities/id/07d697c5-1c15…
Metrics
- CVSS 3.1
-
6.4
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N - EPSS — exploit probability
- 0% percentile: 12 · as of 9 November 2026
- CWE
- CWE-79
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.