CVE-2021-47976
HIGH
NVD
CVSS Score
8.8
Severity
HIGH
Published
May 16, 2026
Vendor
unknown
Description
TextPattern CMS 4.9.0-dev contains a remote code execution vulnerability that allows authenticated attackers to upload arbitrary PHP files by exploiting the plugin upload functionality. Attackers can authenticate, retrieve a CSRF token from the plugin event page, and upload malicious PHP files to the textpattern/tmp/ directory for code execution.