WordPress Gutentor <3.5.5 Stored XSS via Contributor Access
CVE-2026-2951 Published on April 23, 2026
Gutentor – Gutenberg Blocks – Page Builder for Gutenberg Editor <= 3.5.5 - Authenticated (Contributor+) Stored Cross-Site Scripting via Gutentor Block HTML
The Gutentor Gutenberg Blocks Page Builder for Gutenberg Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 3.5.5 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.
Timeline
Disclosed
Weakness Type
What is a XSS Vulnerability?
The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
CVE-2026-2951 has been classified to as a XSS vulnerability or weakness.
Affected Versions
Gutentor – Gutenberg Blocks – Page Builder for Gutenberg Editor:- Before and including 3.5.5 is affected.