CVE-2021-47976

HIGH 8.8

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

CVSS Score

8.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-352
Vendor	textpattern
Product	textpattern cms
Published	May 16, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Textpattern / TextPattern CMS

4.9.0-dev

References

NVD ↗ CVE.org ↗ EPSS Data ↗

exploit-db.com: https://www.exploit-db.com/exploits/50095 textpattern.com: https://textpattern.com/ github.com: https://github.com/textpattern/textpattern vulncheck.com: https://www.vulncheck.com/advisories/textpattern-cms-dev-authenticated-remote-code-execution-via-plugin-upload

Credits

Mevlüt Akçam