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High · 8.8 CVE-2021-47943 EUVD-2021-34803GHSA-3fw2-x5r9-x34j

TextPattern CMS 4.8.7 Remote Code Execution via File Upload

Published May 10, 2026 · Updated May 11, 2026 · Assigned by VulnCheck

Description

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

VendorProductAffectedFixed
Textpattern TextPattern CMS 4.8.7 —

References