Medium severity · published Jun 25, 2026
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
6.4
CVSS
0.3%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 26% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GE
Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns · wpdevteam
through 6.1.4 · source: vendor
Affected product
GE
Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns
wpdevteam
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-10833
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-10833
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/essential-blocks/tags/6.1.4/includes/Blocks/TableOfContents.php#L245
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/essential-blocks/tags/6.1.4/includes/Blocks/TableOfContents.php#L425
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/essential-blocks/tags/6.1.4/src/blocks/table-of-contents/src/frontend.js#L448
www.wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/0efe8bbd-c1c9-48ed-adab-34c0ac3da8bf?source=cve
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