HT Mega < 2.4.7 - Contributor+ Stored XSS via size

Description

The plugin is vulnerable to Stored Cross-Site Scripting via the 'size' value in several widgets due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers with contributor-level and above permissions to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.