Description
The file scanning mechanism of JFilterInput::isFileSafe() in Joomla! CMS before 3.6.5 does not consider alternative PHP file extensions when checking uploaded files for PHP content, which enables a user to upload and execute files with the `.php6`, `.php7`, `.phtml`, and `.phpt` extensions. Additionally, JHelperMedia::canUpload() did not blacklist these file extensions as uploadable file types.
Remediation
References
Related Vulnerabilities
Oracle JRE CVE-2013-2420 Vulnerability (CVE-2013-2420)
Oracle Database Server CVE-2010-4420 Vulnerability (CVE-2010-4420)
WordPress Plugin Front-end Editor 'upload.php' Arbitrary File Upload (2.2.1)
WordPress Plugin Complianz-GDPR/CCPA Cookie Consent Cross-Site Scripting (6.4.1)
Oracle Database Server CVE-2011-0875 Vulnerability (CVE-2011-0875)