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CVE-2021-47976

Published: May 16, 2026

Modified: May 18, 2026

PUBLISHED

CVSS v3.1

8.8

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.

Vendor	Product	Versions
Textpattern	TextPattern CMS	affected `4.9.0-dev`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

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

References

ExploitDB-50095

exploit

Official Product Homepage

product

Product Reference

product

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

third-party-advisory

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