Spectra – WordPress Gutenberg Blocks < 2.12.9 - Contributor+ Stored XSS via Testimonial Block

Description The plugin is vulnerable to Stored Cross-Site Scripting via the plugin’s Testimonial and Image Gallery blocks 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.