CVE-2021-47976
High
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.
SeverityHigh
CVSS8.8
Exploit probability—
Product
TextPattern CMS
PublishedMay 16, 2026
First seenMay 16, 2026
Weakness typeCWE-352Cross-site request forgery (CSRF)
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Textpattern TextPattern CMS | 4.9.0-dev | — |
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