CVE-2021-47943

TextPattern CMS 4.8.7 Remote Code Execution via File Upload

Published May 10, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description 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.
Title TextPattern CMS 4.8.7 Remote Code Execution via File Upload
First Time appeared Textpattern
Textpattern textpattern
Weaknesses CWE-434
CPEs cpe:2.3:a:textpattern:textpattern:4.8.7:-:*:*:*:*:*:*
Vendors & Products Textpattern
Textpattern textpattern
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.7, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
May 11, 2026, 3:17 PM
Reserved
Feb 1, 2026, 11:24 AM
Status
Deferred
Published
May 10, 2026, 1:16 PM
Modified
Jul 25, 2026, 10:10 AM