Vulnerability · Published May 10, 2026 · Assigned by VulnCheck

CVE-2021-47943TextPattern CMS 4.8.7 Remote Code Execution via File Upload

High 8.8

In plain English

A high-severity unrestricted file upload in TextPattern CMS from Textpattern. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.6%top 50.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Textpattern	TextPattern CMS	4.8.7

Weakness: CWE-434 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

ExploitDB-49996 exploit
ExploitDB-50415 exploit
VulnCheck Advisory: TextPattern CMS 4.8.7 Remote Code Execution via File Upload third-party-advisory