CVE-2026-14190: Sina Extension for Elementor XSS Flaw

CVE-2026-14190 Overview

CVE-2026-14190 is a reflected Cross-Site Scripting (XSS) vulnerability in the Sina Extension for Elementor WordPress plugin in versions before 3.10.2. The plugin fails to escape a value reconstructed from request input inside one of its unauthenticated AJAX handlers before reflecting it into the HTML response. Unauthenticated attackers can execute arbitrary JavaScript in the browser of any visitor who triggers a crafted request. The issue is classified under CWE-79: Improper Neutralization of Input During Web Page Generation.

Critical Impact
Unauthenticated attackers can execute arbitrary JavaScript in victim browsers by luring them to crafted requests, enabling session theft, credential harvesting, and administrative account takeover.

Affected Products

Sina Extension for Elementor WordPress plugin versions before 3.10.2
WordPress sites using vulnerable plugin builds with public-facing AJAX endpoints
WordPress installations exposing the unauthenticated AJAX handler to visitors

Discovery Timeline

2026-07-27 - CVE-2026-14190 published to the National Vulnerability Database (NVD)
2026-07-27 - Last updated in NVD database

Technical Details for CVE-2026-14190

Vulnerability Analysis

The Sina Extension for Elementor plugin registers an AJAX handler that is reachable without authentication. The handler reconstructs a value from request input and writes it into the HTML response without applying output escaping. Because WordPress AJAX handlers respond to any visitor, an attacker can craft a URL or form submission that carries JavaScript payloads into the reflected response. When a victim triggers the request, the browser parses and executes the injected script in the site's origin. This grants the attacker access to cookies, session tokens, and DOM state available to the victim.

Root Cause

The root cause is missing output encoding in an AJAX handler. Input taken from the request is transformed and concatenated into HTML markup without calls to WordPress escaping helpers such as esc_html(), esc_attr(), or wp_kses(). Reconstruction of the value from request parameters obscures the taint, but the sink still renders attacker-controlled data as HTML.

Attack Vector

Exploitation requires user interaction, typically a victim clicking a crafted link or visiting a page that issues the AJAX request. The attack traverses the network without authentication and crosses a security scope, because the injected script runs in the WordPress site's origin. Successful exploitation can pivot to actions performed as the victim, including administrative operations if a logged-in administrator is targeted. Additional technical detail is available in the WPScan Vulnerability Report.

No verified public exploit code is available. The vulnerability mechanism is described in prose to avoid speculative payload construction.

Detection Methods for CVE-2026-14190

Indicators of Compromise

Requests to wp-admin/admin-ajax.php containing HTML metacharacters such as <, >, or " inside parameters consumed by Sina Extension handlers
AJAX responses that echo request-derived values containing <script>, onerror=, or javascript: substrings
Referrer headers pointing to attacker-controlled domains preceding administrative session anomalies
New WordPress administrator accounts or plugin installations following suspicious AJAX traffic

Detection Strategies

Inspect web server access logs for unauthenticated admin-ajax.php requests carrying encoded script payloads in query or POST bodies
Deploy a Web Application Firewall (WAF) rule that flags reflected script content in AJAX responses from Sina Extension actions
Correlate outbound requests from user browsers to unknown domains shortly after AJAX responses render on affected pages

Monitoring Recommendations

Alert on WordPress administrator logins immediately following interaction with crafted external links
Baseline the volume and parameter shape of Sina Extension AJAX actions and alert on deviations
Track plugin version inventory across WordPress fleets and flag hosts running Sina Extension for Elementor below 3.10.2

How to Mitigate CVE-2026-14190

Immediate Actions Required

Upgrade the Sina Extension for Elementor plugin to version 3.10.2 or later on all affected WordPress sites
Audit administrator and editor accounts for unexpected activity, new users, or modified content
Rotate WordPress administrator passwords and invalidate active sessions after patching

Patch Information

The vendor addressed the flaw in Sina Extension for Elementor version 3.10.2 by escaping the reflected value before it is returned in the AJAX response. Refer to the WPScan Vulnerability Report for advisory details and update guidance.

Workarounds

Disable or remove the Sina Extension for Elementor plugin until the update to 3.10.2 is applied
Restrict access to wp-admin/admin-ajax.php at the WAF layer for the specific vulnerable action names when patching is delayed
Enforce a strict Content Security Policy (CSP) that disallows inline script execution to reduce reflected XSS impact

bash

# Update the plugin using WP-CLI
wp plugin update sina-extension-for-elementor --version=3.10.2

# Verify the installed version
wp plugin get sina-extension-for-elementor --field=version