What’s Vulnerable › Vulnerabilities

CVE-2026-14855: RT Mega Menu <= 1.5.1 - Authenticated (Subscriber+) Stored Cross-Site Scripting via rtmega_update_menu_options AJAX Action

• Severity: medium (CVSS 6.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-18 · updated 2026-10-14
• Weakness: CWE-79

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 products

• themewant RT Mega Menu – Mega Menu Builder for Elementor & Gutenberg: through 1.5.1

References

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

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