CVE-2026-10833: Gutenberg Essential Blocks - Page Builder for Gutenberg Blocks & Patterns <= 6.1.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'configurablePrefix' Block Attribute
The Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'configurablePrefix' Block Attribute in all versions up to, and including, 6.1.4 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.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-10833?
CVE-2026-10833 has a medium severity rating of 6.4.
How do I fix CVE-2026-10833?
To fix CVE-2026-10833, ensure you update the Gutenberg Essential Blocks plugin to version 6.1.5 or later.
What type of vulnerability is CVE-2026-10833?
CVE-2026-10833 is an Authenticated (Contributor+) Stored Cross-Site Scripting vulnerability.
What causes the vulnerability in CVE-2026-10833?
The vulnerability in CVE-2026-10833 is caused by insufficient input sanitization and output escaping in the 'configurablePrefix' Block Attribute.
Who is affected by CVE-2026-10833?
Users of the Gutenberg Essential Blocks for WordPress version 6.1.4 and below are affected by CVE-2026-10833.