Kenta Gutenberg Blocks Responsive Blocks and block templates library for Gutenberg Editor <= 1.3.9 is vulnerable to Cross Site Scripting (XSS) vulnerability

The Kenta Blocks – Responsive Blocks and block templates library plugin for WordPress is vulnerable to Stored Cross-Site Scripting in all versions up to, and including, 1.3.9 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.