Vulnerability · Published Jan 23, 2026 · Assigned by VulnCheck
CVE-2021-47888Textpattern 4.8.3 - Remote code execution
High 8.8
In plain English
A high-severity unrestricted file upload in Textpattern from The Textpattern Development Team. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 54% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.7%top 46.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
Textpattern versions prior to 4.8.3 contain an authenticated remote code execution vulnerability that allows logged-in users to upload malicious PHP files. Attackers can upload a PHP file with a shell command execution payload and execute arbitrary commands by accessing the uploaded file through a specific URL parameter.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| The Textpattern Development Team | Textpattern | 4.8.3 |
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-49620 exploit
- Official Vendor Homepage product
- Textpattern Software Download Page product
- VulnCheck Advisory: Textpattern 4.8.3 - Remote code execution third-party-advisory