An issue was discovered in Squiz Matrix from 5.3 through to 5.3.6.1 and 5.4.1.3. An information disclosure caused by a Path Traversal issue in the 'File Bridge' plugin allowed the existence of files outside of the bridged path to be confirmed.
An issue was discovered in Squiz Matrix before 5.3.6.1 and 5.4.x before 5.4.1.3. There are multiple reflected Cross-Site Scripting (XSS) issues in Matrix WYSIWYG plugins.
An issue was discovered in Squiz Matrix before 5.3.6.1 and 5.4.x before 5.4.1.3. Authenticated users with permissions to edit design assets can cause Remote Code Execution (RCE) via a maliciously crafted time_format tag.