CVE-2026-15273CWE-79cross-site-scripting

CVE-2026-15273

Medium · published September 26, 2026

CVSS v3.1
6.4
EPSS
0%
Percentile
11.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00215 · 11.3th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-09-26T07:17Z
References (6)
https://automaticcss.com/changelogs/ · [email protected]https://plugins.trac.wordpress.org/browser/automaticcss-plugin/trunk/classes/Helpers/Logger.php#L187 · [email protected]https://plugins.trac.wordpress.org/browser/automaticcss-plugin/trunk/classes/Lib/WideEvents/Formatter/JsonFormatter.php#L25 · [email protected]https://plugins.trac.wordpress.org/browser/automaticcss-plugin/trunk/classes/Plugin.php#L175 · [email protected]https://plugins.trac.wordpress.org/browser/automaticcss-plugin/trunk/classes/UI/Settings_Page/Activity_Log.php#L90 · [email protected]https://www.wordfence.com/threat-intel/vulnerabilities/id/07d697c5-1c15-4d3a-8637-cc4fd408f209?source=cve · [email protected]
EPSS history
Timeline
  • 27 SEP 03:25Z
    EPSS moved — → 0%
    epss
  • 26 SEP 02:28Z
    Automatic.css 4.0.0 - Unauthenticated Stored Cross-Site Scripting via REQUEST_URI
    cvelistv5