CVE-2026-9281

Master Addons For Elementor <= 3.1.0 - Authenticated (Author+) Stored Cross-Site Scripting via 'jtlma_custom_js' Page Setting (Custom JS Extension)

2026-06-05 12:04
Kyokito

Strategic Overview

Status
Patched in 3.1.1
Affected Plugin
Master Addons for Elementor – Elementor Addons, Widgets, Mega Menu Builder, Popup Builder, Widget Builder & Template Kits
Affected Version
<= 3.1.0
CVSS
6.4Medium
Weakness type
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE
CVE-2026-9281
View all Master Addons for Elementor – Elementor Addons, Widgets, Mega Menu Builder, Popup Builder, Widget Builder & Template Kits vulnerabilities

At a glance

CVE-2026-9281 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Master Addons for Elementor WordPress plugin, affecting versions <= 3.1.0. It carries a CVSS score of 6.4 (reachable over the network; low attack complexity). Exploitation requires an authenticated account at Author level or above. The issue is fixed in version 3.1.1; sites on affected versions should update now. Disclosed June 2026, reported by Kyokito.

Vulnerability Overview

The Master Addons For Elementor – Widgets, Extensions, Theme Builder, Popup Builder & Template Kits plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'jtlma_custom_js' Page Setting (Custom JS Extension) in all versions up to, and including, 3.1.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The unfiltered_html capability check is only enforced during Elementor control registration (UI rendering) and not during the save process, enabling Author-level users to inject the jtlma_custom_js setting directly via a crafted POST request to admin-ajax.php?action=elementor_ajax, bypassing the UI-level restriction entirely.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user.

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Master Addons for Elementor <= 3.1.0 carries this weakness at jtlma_custom_js, and reaching it takes an account at Author level or above. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.

Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For Master Addons for Elementor the fix is 3.1.1: builds <= 3.1.0 are affected, anything from 3.1.1 onward is not.

Remediation

Update to version 3.1.1, or a newer patched version

How does WordSec protect against this?

An attacker needs Author access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Master Addons for Elementor 3.1.1 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-9281https://www.wordfence.com/threat-intel/vulnerabilities/id/5b8e052a-6e60-4455-96c9-b2a3e86773dahttps://nvd.nist.gov/vuln/detail/CVE-2026-9281

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C