CVE-2023-6692: Ultimateblocks Ultimate Blocks – 25+ Gutenberg Blocks For Block Editor

Medium severity, CVSS 6.4. EPSS: 0.3% chance of exploitation in the next 30 days.

The Ultimate Blocks – WordPress Blocks Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's tab anchor metabox in all versions up to, and including, 3.0.8 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.

Affected products

• Ultimateblocks Ultimate Blocks – 25+ Gutenberg Blocks For Block Editor: up to and including 3.1.0

Published 2024-06-19. Last modified 2026-06-17.