Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Gutentor Gutentor allows DOM-Based XSS.This issue affects Gutentor: from n/a through 3.4.0.

The Gutentor – Gutenberg Blocks – Page Builder for Gutenberg Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's Countdown widget in all versions up to, and including, 3.3.9 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.

The Gutentor WordPress plugin before 3.3.6 does not validate and escape some of its block options before outputting them back in a page/post where the block is embed, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gutentor Gutentor - Gutenberg Blocks - Page Builder for Gutenberg Editor allows Stored XSS.This issue affects Gutentor - Gutenberg Blocks - Page Builder for Gutenberg Editor: from n/a through 3.3.5.