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.