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Improper Input Validation Affecting typo3/cms-core package, versions >=11.0.0, <11.1.1 >=10.0.0, <10.4.14 >=8.0.0, <9.5.25

0.0
high

Snyk CVSS

    Attack Complexity Low
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.11% (43rd percentile)
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NVD
8.3 high

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  • Snyk ID SNYK-PHP-TYPO3CMSCORE-1086575
  • published 18 Mar 2021
  • disclosed 17 Mar 2021
  • credit Richie Lee
Report a new vulnerability Found a mistake?

Introduced: 17 Mar 2021

CVE-2021-21357 Open this link in a new tab
CWE-20 Open this link in a new tab

How to fix?

Upgrade typo3/cms-core to version 11.1.1, 10.4.14, 9.5.25 or higher.

Overview

typo3/cms-core is a free open source enterprise content management system.

Affected versions of this package are vulnerable to Improper Input Validation. Attackers can by-pass restrictions of predefined options and submit arbitrary data in the Form Designer backend module of the Form Framework. In the default configuration of the Form Framework this allows attackers to explicitly allow arbitrary mime-types for file uploads - however, default fileDenyPattern successfully blocks files like .htaccess or malicious.php. Besides that, attackers can persist those files in any writable directory of the corresponding TYPO3 installation.