CVE-2021-21408 HIGH

CVE-2021-21408: Access to restricted PHP code by dynamic static class access in smarty

Vendor Smarty-Php
Product smarty
Weakness CWE-20 · Input validation
Published January 10, 2022
Last update April 23, 2025
View on NVD All CVEs

CVSS base score

8.8/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

Smarty is a template engine for PHP, facilitating the separation of presentation (HTML/CSS) from application logic. Prior to versions 3.1.43 and 4.0.3, template authors could run restricted static php methods. Users should upgrade to version 3.1.43 or 4.0.3 to receive a patch.

Key dates

02Disclosure timeline

January 10, 2022 CVE published
April 23, 2025 Record updated