CVE-2025-63026: Elementor Grand Restaurant Theme XSS Flaw

CVE-2025-63026 Overview

CVE-2025-63026 is a Stored Cross-Site Scripting (XSS) vulnerability affecting the Grand Restaurant Theme Elements for Elementor WordPress plugin developed by ThemeGoods. This vulnerability stems from improper neutralization of input during web page generation (CWE-79), allowing attackers to inject malicious scripts that persist in the application and execute in the browsers of other users who view the affected pages.

The vulnerability affects all versions of the Grand Restaurant Theme Elements for Elementor plugin through version 2.1.1. Stored XSS vulnerabilities are particularly dangerous because the malicious payload persists in the target application, affecting multiple users without requiring attacker interaction for each victim.

Critical Impact

Attackers can inject persistent malicious scripts into WordPress pages built with the Grand Restaurant Theme Elements for Elementor plugin, potentially stealing user credentials, hijacking admin sessions, or defacing website content.

Affected Products

• Grand Restaurant Theme Elements for Elementor versions through 2.1.1
• WordPress sites using the grandrestaurant-elementor plugin
• Sites utilizing Elementor page builder with ThemeGoods restaurant theme elements

Discovery Timeline

• 2026-01-22 - CVE-2025-63026 published to NVD
• 2026-01-22 - Last updated in NVD database

Technical Details for CVE-2025-63026

Vulnerability Analysis

This Stored XSS vulnerability exists within the Grand Restaurant Theme Elements for Elementor plugin, which extends Elementor's capabilities with restaurant-themed widgets and design elements. The vulnerability occurs because user-supplied input is not properly sanitized or encoded before being rendered in web pages, allowing malicious JavaScript code to be stored in the WordPress database and executed when pages are viewed.

In WordPress environments, Elementor plugins handle various user inputs through widget settings, content fields, and custom attributes. When these inputs are not properly escaped using WordPress sanitization functions like esc_html(), esc_attr(), or wp_kses(), attackers can inject script tags or event handlers that execute arbitrary JavaScript in the context of the victim's browser session.

The impact of this vulnerability includes potential theft of authentication cookies, session tokens, and sensitive information. Attackers could also perform actions on behalf of authenticated users, including administrators, potentially leading to complete site compromise.

Root Cause

The root cause of this vulnerability is improper input validation and output encoding within the Grand Restaurant Theme Elements for Elementor plugin. Specifically, the plugin fails to properly sanitize user-controllable input before storing it in the database and does not adequately escape output when rendering content on the frontend. This allows specially crafted input containing JavaScript code to be stored and later executed in users' browsers.

Attack Vector

The attack vector for this vulnerability involves an attacker with sufficient privileges to modify Elementor widget content (typically requiring at least contributor-level access in WordPress). The attacker injects malicious JavaScript payload through vulnerable input fields in the restaurant theme elements. When other users, including administrators, view pages containing the malicious content, the injected script executes in their browser context.

The attack does not require user interaction beyond normal page viewing, and the malicious payload persists until manually removed from the database or the affected content is deleted.

Detection Methods for CVE-2025-63026

Indicators of Compromise

• Unexpected JavaScript code or <script> tags present in Elementor widget content stored in wp_postmeta database table
• Unusual encoded characters or obfuscated strings in restaurant theme element settings
• Reports of unexpected browser behavior, pop-ups, or redirects when viewing pages using Grand Restaurant elements
• Unauthorized modifications to page content built with the vulnerable plugin

Detection Strategies

• Implement Content Security Policy (CSP) headers to detect and block inline script execution attempts
• Monitor WordPress database for suspicious content in post meta fields related to Elementor widgets
• Review web application firewall (WAF) logs for XSS payload patterns targeting the site
• Conduct regular security scans using WordPress security plugins that detect stored XSS payloads

Monitoring Recommendations

• Enable detailed logging for WordPress content modifications and user activity
• Monitor for changes to pages and posts using the Grand Restaurant Theme Elements
• Configure alerts for new user registrations and privilege escalations that could indicate post-exploitation activity
• Review browser-side error console logs for script injection indicators

How to Mitigate CVE-2025-63026

Immediate Actions Required

• Update the Grand Restaurant Theme Elements for Elementor plugin to a patched version when available from ThemeGoods
• Audit all pages and posts using Grand Restaurant elements for suspicious content or unauthorized modifications
• Review user accounts with content editing privileges and remove unnecessary access
• Implement a Web Application Firewall (WAF) with XSS filtering rules

Patch Information

Users should monitor the Patchstack XSS Vulnerability Advisory for updates regarding patches and remediation guidance from the vendor. Check the WordPress plugin repository for updated versions of the grandrestaurant-elementor plugin that address this vulnerability.

Workarounds

• Restrict content editing capabilities to trusted administrators only until a patch is available
• Implement server-side output encoding by adding custom sanitization filters if technically feasible
• Deploy Content Security Policy headers to mitigate the impact of successful XSS exploitation
• Consider temporarily disabling the vulnerable plugin if it is not critical to site functionality

# WordPress configuration to restrict user capabilities
# Add to wp-config.php or a custom plugin to limit who can use unfiltered HTML

# Disable unfiltered HTML for non-admins
define('DISALLOW_UNFILTERED_HTML', true);

# Example .htaccess Content Security Policy header
# Add to .htaccess file in WordPress root
<IfModule mod_headers.c>
    Header set Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline';"
</IfModule>