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CVE-2026-14855

MEDIUM 6.4 CVSS 3.1
Published
September 18, 2026
Last modified
October 14, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-79
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Description

The RT Mega Menu plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'css[left]' parameter in all versions up to, and including, 1.5.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Affected WordPress components

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • themewant RT Mega Menu – Mega Menu Builder for Elementor & Gutenberg — Up to and including 1.5.1

References

  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/rt-mega-menu/tags/1.5.1/admin/includes/admin-ajax-request.php#L34
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/rt-mega-menu/tags/1.5.1/admin/includes/admin-ajax-request.php#L68
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/rt-mega-menu/tags/1.5.1/admin/includes/plugin-scripts.php#L81
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/rt-mega-menu/tags/1.5.1/public/includes/rt-mega-menu-terms.php#L82
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/rt-mega-menu/tags/1.5.1/public/includes/rtmega-nav-walker.php#L186
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset/3604791/rt-mega-menu/trunk/admin/includes/admin-ajax-request.php
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/4302ab90-f827-4e25-b72f-d41542d3bad3?source=cve
  • nvd.nist.gov Official NVD record