CVE-2026-14855 json
RT Mega Menu <= 1.5.1 - Authenticated (Subscriber+) Stored Cross-Site Scripting via rtmega_update_menu_options AJAX Action
published 2026-09-18 52 d ago modified 2026-10-14 25 d ago also EUVD-2026-82644
- cvss
- 6.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 28%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 51 d ago
Exploit prediction
0.35% chance of exploitation in the next 30 days, higher than 28% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
Affected products
- themewant RT Mega Menu – Mega Menu Builder for Elementor & Gutenberg
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/4302ab90-f827-4e25-b72f-d41542d3bad3?source=cve
- plugins.trac.wordpress.org /browser/rt-mega-menu/tags/1.5.1/public/includes/rtmega-nav-walker.php#L186
- plugins.trac.wordpress.org /browser/rt-mega-menu/tags/1.5.1/admin/includes/admin-ajax-request.php#L68
- plugins.trac.wordpress.org /browser/rt-mega-menu/tags/1.5.1/admin/includes/admin-ajax-request.php#L34
- plugins.trac.wordpress.org /browser/rt-mega-menu/tags/1.5.1/admin/includes/plugin-scripts.php#L81
- plugins.trac.wordpress.org /browser/rt-mega-menu/tags/1.5.1/public/includes/rt-mega-menu-terms.php#L82
- plugins.trac.wordpress.org /changeset/3604791/rt-mega-menu/trunk/admin/includes/admin-ajax-request.php
Sources
- CVE List CVE-2026-14855
- NVD CVE-2026-14855
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.