CVE-2021-47976CWE-352

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

High · published May 16, 2026

CVSS v4.0
8.7
EPSS
0%
Percentile
23.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.7 · HIGH
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.00315 · 23.1th percentile
Weakness
CWE-352 · Cross-Site Request Forgery (CSRF)
Published
2026-05-16T15:26Z
EPSS history
Timeline
  • 16 MAY 15:26Z
    TextPattern CMS 4.9.0-dev Authenticated Remote Code Execution via Plugin Upload
    cvelistv5