CVE-2021-47943: Textpattern CMS

High severity, CVSS 8.8. EPSS: 0.6% chance of exploitation in the next 30 days.

TextPattern CMS 4.8.7 contains a remote code execution vulnerability that allows authenticated attackers to execute arbitrary commands by uploading malicious PHP files through the file upload functionality. Attackers can upload a PHP shell via the Files section in the content area and execute commands by accessing the uploaded file at /textpattern/files/ with GET parameters passed to the system function.

Affected products

• Textpattern Textpattern CMS: version 4.8.7 only

Published 2026-05-10. Last modified 2026-07-25.