CVE-2025-39590 Overview
CVE-2025-39590 is a stored cross-site scripting (XSS) vulnerability in the WPDeveloper Essential Addons for Elementor plugin for WordPress. The flaw affects all versions of the Lite edition up to and including 6.1.9. An authenticated attacker with contributor-level privileges can inject persistent JavaScript payloads that execute when other users, including administrators, render the affected page. The vulnerability is classified under CWE-79 for improper neutralization of input during web page generation.
Critical Impact
A low-privileged authenticated user can store malicious scripts that execute in the browsers of site visitors and administrators, enabling session theft, account takeover, and unauthorized administrative actions.
Affected Products
- WPDeveloper Essential Addons for Elementor Lite versions up to and including 6.1.9
- WordPress installations with the essential-addons-for-elementor-lite plugin enabled
- Sites permitting contributor or higher user registration with plugin widget access
Discovery Timeline
- 2025-04-16 - CVE-2025-39590 published to the National Vulnerability Database
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-39590
Vulnerability Analysis
The vulnerability stems from improper input neutralization within widget-rendering code paths in the Essential Addons for Elementor plugin. User-supplied content passed through affected widget parameters is written into the page HTML without sufficient sanitization or output encoding. Attackers can embed HTML event handlers or <script> payloads that persist in the WordPress database and execute for any user who loads the rendered page.
Because the attack scope changes according to the CVSS vector, the injected script runs in the security context of the viewing user. Administrator viewers can be coerced into performing privileged actions through their authenticated session, including creating new admin accounts, modifying plugin settings, or planting persistent backdoors via theme or plugin editors.
Root Cause
The root cause is missing or insufficient application of WordPress sanitization functions such as wp_kses_post(), esc_html(), or esc_attr() on user-controlled widget attributes before they are echoed into the HTML output. The affected component reflects contributor-supplied data into the DOM verbatim, allowing browser interpretation of injected script content.
Attack Vector
Exploitation requires an authenticated account with at least contributor-level privileges and permission to use Elementor widgets. The attacker crafts a page or post using an affected Essential Addons widget, supplying a malicious payload in a vulnerable field. The payload is stored in the WordPress database and executed when any user, including administrators reviewing the post, renders the content. User interaction is required, which aligns with the UI:R component of the CVSS vector. Refer to the Patchstack Vulnerability Report for additional technical context.
Detection Methods for CVE-2025-39590
Indicators of Compromise
- Unexpected <script> tags, javascript: URIs, or HTML event handlers such as onerror, onload, or onmouseover in WordPress post_content or postmeta rows tied to Elementor data
- Newly created administrator accounts or role escalations following contributor page edits
- Outbound requests from browsers rendering affected pages to unfamiliar external domains hosting attacker JavaScript
- Modifications to plugin, theme, or wp-config.php files with no corresponding administrator action
Detection Strategies
- Query the wp_posts table for Elementor-authored content containing script-injection patterns in serialized widget settings
- Deploy web application firewall rules that inspect POST requests to admin-ajax.php and Elementor editor endpoints for XSS payload signatures
- Correlate contributor account activity with subsequent administrator session anomalies in web server access logs
Monitoring Recommendations
- Enable WordPress audit logging for post revisions, user role changes, and plugin file modifications
- Monitor browser Content Security Policy (CSP) violation reports for blocked inline scripts on pages authored by non-administrators
- Alert on outbound HTTP requests from administrator sessions to domains not on an approved allowlist
How to Mitigate CVE-2025-39590
Immediate Actions Required
- Update Essential Addons for Elementor Lite to a version later than 6.1.9 as soon as a fixed release is available from WPDeveloper
- Audit all contributor, author, and editor accounts and disable any that are inactive or unrecognized
- Review recent posts and pages authored by low-privileged users for embedded scripts or suspicious HTML
Patch Information
WPDeveloper addresses this issue in releases after 6.1.9. Consult the Patchstack Vulnerability Report for the current fixed version and upgrade guidance. Apply the update through the WordPress plugin management interface or via WP-CLI using wp plugin update essential-addons-for-elementor-lite.
Workarounds
- Temporarily deactivate the Essential Addons for Elementor plugin until the patched version is installed
- Restrict Elementor editor access to trusted administrator and editor roles only
- Deploy a Content Security Policy that disallows inline scripts and untrusted external script sources to reduce XSS impact
- Route traffic through a web application firewall configured with rules that block common XSS payloads targeting Elementor endpoints
# Configuration example: update the plugin using WP-CLI
wp plugin update essential-addons-for-elementor-lite
# Verify the installed version
wp plugin get essential-addons-for-elementor-lite --field=version
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
