Stored Cross-Site Scripting Vulnerability in Gutenverse Plugin for WordPress
CVE-2026-12399

4.4MEDIUM

Key Information:

Vendor

WordPress
Status
Gutenverse – WordPress Blocks, Page Builder & Site Editor
Vendor
CVE Published:
27 June 2026

What is CVE-2026-12399?

The Gutenverse plugin for WordPress, affecting all versions up to and including 3.8.0, is susceptible to a stored cross-site scripting issue due to inadequate input sanitization and output escaping within admin settings. This vulnerability allows authenticated attackers with editor-level permissions or higher to inject malicious web scripts into pages. When a user accesses an affected page, the injected scripts execute, posing a risk particularly in multi-site setups and when the unfiltered_html configuration is disabled.

Affected Version(s)

Gutenverse – WordPress Blocks, Page Builder & Site Editor 0 <= 3.8.0

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/gutenverse/tag...
https://plugins.trac.wordpress.org/browser/gutenverse/tag...

CVSS V3.1

Score:
4.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
High
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

R4mbb
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