6.4
Medium
CVE-2026-19943 The Gutenverse – WordPress Blocks, Page Builder & Site Editor plugin for WordPress is vulnerable to Stored Cross-Site…
Description
The Gutenverse – WordPress Blocks, Page Builder & Site Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'titleTag' Block Attribute in all versions up to, and including, 4.0.2 due to insufficient input sanitization and output escaping. 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 malicious titleTag value survives wp_kses_post on save because it is stored inside a block-comment delimiter and the live HTML is only synthesized at render time by do_blocks(), meaning the payload also fires in administrator and editor sessions during post preview.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Gutenverse – WordPress Blocks, Page Builder & Site Editor 4.0 | earliest → 4.0.2 | No fix stated |
Other CVEs of Gutenverse – WordPress Blocks, Page Builder & Site Editor
The 5 CVEs of Gutenverse – WordPress Blocks, Page Builder & Site Editor →
CVE-2026-92746
The Gutenverse – WordPress Blocks, Page Builder & Site Editor plugin for WordPress is vulnerable to Stored Cross-Site…
6.4
Medium
CVE-2026-3002
The Gutenverse – Ultimate WordPress FSE Blocks Addons & Ecosystem plugin for WordPress is vulnerable to Stored…
6.4
Medium
CVE-2026-12399
The Gutenverse – WordPress Blocks, Page Builder & Site Editor plugin for WordPress is vulnerable to Stored Cross-Site…
4.4
Medium
CVE-2026-3001
The Gutenverse plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 's' parameter in all…
6.1
Medium