CVE-2021-47943CWE-434

TextPattern CMS 4.8.7 Remote Code Execution via File Upload

High · published May 10, 2026

CVSS v4.0
8.7
EPSS
1%
Percentile
48.9
In the wild
Unconfirmed
What it is

TextPattern CMS 4.8.7 contains a remote code execution vulnerability that allows authenticated attackers to execute arbitrary commands by uploading malicious PHP files through the file upload functionality. Attackers can upload a PHP shell via the Files section in the content area and execute commands by accessing the uploaded file at /textpattern/files/ with GET parameters passed to the system function.

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
0.00617 · 48.9th percentile
Weakness
CWE-434 · Unrestricted Upload of File with Dangerous Type
Published
2026-05-10T12:43Z
EPSS history
Timeline
  • 10 MAY 12:43Z
    TextPattern CMS 4.8.7 Remote Code Execution via File Upload
    cvelistv5