Vulnerability Description
The CMB2 plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'cmb43ex1_grp[0][txt] (wysiwyg field inside group — field id controlled by integrator config)' parameter in all versions up to, and including, 2.13.4 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This is only exploitable when a site integrator renders the plugin's documented front-end form helper with a wysiwyg field inside a repeatable group on a publicly accessible page.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/CMB2/CMB2/commit/fbeb7c4688dc5b8635a34978d837f1d458dcac44
- https://plugins.trac.wordpress.org/browser/cmb2/tags/2.13.4/includes/CMB2_Field.
- https://plugins.trac.wordpress.org/browser/cmb2/tags/2.13.4/includes/CMB2_Saniti
- https://plugins.trac.wordpress.org/browser/cmb2/tags/2.13.4/includes/helper-func
- https://plugins.trac.wordpress.org/browser/cmb2/tags/2.13.4/includes/types/CMB2_
- https://plugins.trac.wordpress.org/changeset/3767609/cmb2/trunk/includes/CMB2_Fi
- https://www.wordfence.com/threat-intel/vulnerabilities/id/97215367-08c0-46cc-a59
FAQ
What is CVE-2026-116761?
CVE-2026-116761 is a vulnerability with a CVSS score of 5.4 (MEDIUM). The CMB2 plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'cmb43ex1_grp[0][txt] (wysiwyg field inside group — field id controlled by integrator config)' parameter in all versi...
How severe is CVE-2026-116761?
CVE-2026-116761 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-116761?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.