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OpenAdvisories
High · 8.8 CVE-2021-47976 EUVD-2021-34835GHSA-77f2-mm55-xvp4

TextPattern CMS 4.9.0-dev Authenticated Remote Code Execution via Plugin Upload

Published May 16, 2026 · Updated May 18, 2026 · Assigned by VulnCheck

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.

Affected products

VendorProductAffectedFixed
Textpattern TextPattern CMS 4.9.0-dev —

References