PT-2026-4504 · Unknown · Textpattern

Ricardo Ruiz · Published 2026-01-23 · Updated 2026-01-24 · CVE-2021-47888

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Textpattern versions prior to 4.8.3

Description Textpattern allows authenticated users to upload malicious PHP files, leading to remote code execution. An attacker can upload a PHP file containing a shell command execution payload and then execute arbitrary commands by accessing the uploaded file through a specific URL parameter.

Recommendations Update to version 4.8.3 or later.

Exploit

Fix

RCE

Unrestricted File Upload

Weakness Enumeration

CWE-434

Related Identifiers

CVE-2021-47888

Affected Products

Textpattern

References · 7

• 🔥 https://exploit-db.com/exploits/49620 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-47888 · Security Note
• https://t.me/CVEtracker/42852 · Telegram Post
• https://textpattern.com/start · Note
• https://twitter.com/CVEnew/status/2014995843158516206 · Twitter Post
• https://textpattern.com · Note
• https://vulncheck.com/advisories/textpattern-remote-code-execution · Note