CVE-2026-15273: Automatic.css 4.0.0 - Unauthenticated Stored Cross-Site Scripting via REQUEST_URI
The Automatic.css plugin for WordPress is vulnerable to Stored Cross-Site Scripting via REQUESTURI 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.
Affected Software
Event History
Frequently Asked Questions
Who is exposed to the injected script?
The script executes when an administrator accesses the plugin's Activity Log settings page. Administrators who do not visit that page are not identified as triggering the stored payload.
Does exploitation require an authenticated WordPress account?
No. The issue is described as exploitable by unauthenticated attackers, so no WordPress account or existing privileges are required.
Which versions are known to be affected?
The provided data identifies Automatic.css version 4.0.0 as affected. It does not provide a fixed version or confirm the status of other versions.