CVE-2026-12399
Description
The Gutenverse – WordPress Blocks, Page Builder & Site Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 3.8.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with editor-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
References
- https://plugins.trac.wordpress.org/browser/gutenverse/tags/3.6.3/lib/framework/helper.php#L1440
- https://plugins.trac.wordpress.org/browser/gutenverse/tags/3.6.3/lib/framework/helper.php#L1775
- https://plugins.trac.wordpress.org/browser/gutenverse/tags/3.6.3/lib/framework/includes/class-api.php#L1956
- https://plugins.trac.wordpress.org/browser/gutenverse/tags/3.6.3/lib/framework/includes/class-frontend-generator.php#L147
- https://plugins.trac.wordpress.org/browser/gutenverse/tags/3.6.3/lib/framework/includes/class-global-variable.php#L78
- https://plugins.trac.wordpress.org/browser/gutenverse/tags/3.8.0/lib/framework/helper.php#L1440
- https://plugins.trac.wordpress.org/browser/gutenverse/tags/3.8.0/lib/framework/helper.php#L1775
- https://plugins.trac.wordpress.org/browser/gutenverse/tags/3.8.0/lib/framework/includes/class-api.php#L1956
- https://plugins.trac.wordpress.org/browser/gutenverse/tags/3.8.0/lib/framework/includes/class-frontend-generator.php#L147
- https://plugins.trac.wordpress.org/browser/gutenverse/tags/3.8.0/lib/framework/includes/class-global-variable.php#L78
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3578328%40gutenverse&new=3578328%40gutenverse&sfp_email=&sfph_mail=
- https://www.wordfence.com/threat-intel/vulnerabilities/id/fd1c679b-43e0-4e3a-ae2d-f6ff8a657512?source=cve
CWEs
CWE-79
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.