CVE-2024-23511: Plus Addons for Elementor XSS Flaw

CVE-2024-23511 Overview

CVE-2024-23511 is a DOM-Based Cross-Site Scripting (XSS) vulnerability affecting The Plus Addons for Elementor Page Builder Lite, a popular WordPress plugin developed by POSIMYTH. This vulnerability arises from improper neutralization of user-supplied input during web page generation, allowing attackers to inject malicious scripts that execute in the context of a victim's browser session.

DOM-Based XSS is particularly dangerous because the malicious payload is processed entirely on the client side, often bypassing traditional server-side security controls and making detection more challenging.

Critical Impact

Authenticated attackers with contributor-level access or higher can inject arbitrary JavaScript that executes in the browsers of site visitors, potentially leading to session hijacking, credential theft, website defacement, or malware distribution.

Affected Products

• The Plus Addons for Elementor Page Builder Lite versions up to and including 5.3.3
• WordPress installations utilizing the vulnerable plugin versions
• Websites using Elementor page builder with this affected addon

Discovery Timeline

• 2026-01-05 - CVE-2024-23511 published to NVD
• 2026-01-08 - Last updated in NVD database

Technical Details for CVE-2024-23511

Vulnerability Analysis

This vulnerability is classified under CWE-79 (Improper Neutralization of Input During Web Page Generation). The flaw exists within the plugin's handling of user-controllable input that is subsequently rendered in the Document Object Model (DOM) without proper sanitization or encoding.

The attack requires network access and an authenticated user with at least contributor-level privileges on the WordPress site. The vulnerability has a changed scope, meaning successful exploitation can impact resources beyond the vulnerable component's security scope—specifically, it can affect site visitors who view pages containing the injected payload.

The exploitation requires user interaction, as a victim must visit a page containing the malicious payload for the XSS to execute. However, once triggered, the impact spans confidentiality, integrity, and availability of the affected user's session and data.

Root Cause

The root cause of this vulnerability lies in insufficient input validation and output encoding within The Plus Addons for Elementor Page Builder Lite plugin. Specifically, user-supplied data is inserted into the DOM through JavaScript operations without being properly sanitized, allowing attackers to break out of the intended data context and inject executable script code.

WordPress plugins extending page builders like Elementor often handle complex widget configurations and dynamic content rendering. When these inputs are processed client-side without adequate security controls, DOM-Based XSS vulnerabilities can emerge.

Attack Vector

The attack vector is network-based and requires the attacker to have an authenticated session with contributor-level access or higher on the target WordPress installation. The attacker crafts a malicious payload containing JavaScript code and injects it through the vulnerable plugin functionality.

When a victim (such as a site administrator or regular visitor) navigates to a page containing the malicious content, the browser executes the injected script. This can lead to various attack scenarios including cookie theft, session token exfiltration, keylogging, phishing overlay injection, or redirection to malicious sites.

For detailed technical analysis of the vulnerability mechanism, refer to the Patchstack WordPress Vulnerability Report.

Detection Methods for CVE-2024-23511

Indicators of Compromise

• Unexpected JavaScript code or suspicious script tags within WordPress pages or posts created using Elementor with The Plus Addons
• Browser console errors indicating blocked inline scripts (if Content Security Policy is enabled)
• Unusual user activity logs showing contributors or authors modifying pages with encoded or obfuscated content
• Reports of session hijacking or phishing attempts targeting site administrators

Detection Strategies

• Monitor WordPress audit logs for suspicious content modifications by contributor-level users
• Implement Content Security Policy (CSP) headers to detect and block inline script execution
• Scan page content and database for common XSS payloads such as <script>, javascript:, onerror=, and similar patterns
• Deploy Web Application Firewall (WAF) rules configured to detect XSS injection attempts in Elementor widget data

Monitoring Recommendations

• Enable detailed access logging on the WordPress installation to track user activities
• Configure browser-level security reporting via CSP report-uri directive
• Implement real-time alerting for modifications to published pages by non-administrative users
• Regularly audit plugin usage and user permission levels across the WordPress site

How to Mitigate CVE-2024-23511

Immediate Actions Required

• Update The Plus Addons for Elementor Page Builder Lite to a version newer than 5.3.3 immediately
• Audit existing pages and posts for any suspicious or unexpected JavaScript content
• Review contributor and author user accounts for unauthorized access or compromise
• Temporarily restrict contributor-level publishing capabilities until the patch is applied

Patch Information

The vulnerability affects The Plus Addons for Elementor Page Builder Lite versions from the initial release through 5.3.3. Users should update to the latest available version through the WordPress plugin repository. For detailed patch information and security recommendations, consult the Patchstack WordPress Vulnerability Report.

Workarounds

• Implement strict Content Security Policy headers to mitigate the impact of XSS attacks
• Limit user role capabilities to prevent contributors from publishing content directly
• Deploy a Web Application Firewall (WAF) with XSS detection rules enabled
• Consider temporarily deactivating the plugin until a patched version is installed

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