CVE-2026-14855: Themewant Rt Mega Menu – Mega Menu Builder For Elementor & Gutenberg

Medium severity, CVSS 6.4. EPSS: 0.2% chance of exploitation in the next 30 days.

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: up to and including 1.5.1

Published 2026-09-18. Last modified 2026-09-18.