CVE-2025-22321: ElementsCSS Addons for Elementor XSS

CVE-2025-22321 Overview

CVE-2025-22321 is a stored Cross-Site Scripting (XSS) vulnerability in the TheInnovs ElementsCSS Addons for Elementor WordPress plugin. The flaw stems from improper neutralization of user-supplied input during web page generation [CWE-79]. Authenticated attackers with low privileges can inject persistent JavaScript payloads that execute in the browsers of site visitors and administrators. The vulnerability affects all versions of the plugin from an unspecified initial release through and including 1.0.8.9. Successful exploitation can lead to session hijacking, credential theft, administrative account takeover, and redirection of visitors to attacker-controlled infrastructure.

Critical Impact
Stored XSS with a scope change means injected scripts execute against other users and can compromise confidentiality, integrity, and availability of the WordPress site.

Affected Products

TheInnovs ElementsCSS Addons for Elementor (css-for-elementor) plugin for WordPress
All versions from initial release through 1.0.8.9
WordPress sites using Elementor with this addon installed and active

Discovery Timeline

2025-01-07 - CVE-2025-22321 published to the National Vulnerability Database
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-22321

Vulnerability Analysis

The plugin fails to properly sanitize and encode user-supplied input before rendering it within generated web pages. An authenticated user with contributor-level or similar low privileges can submit crafted input containing JavaScript. The plugin stores this input and later reflects it into the DOM without adequate escaping. Because the payload is stored server-side, it executes every time a visitor loads the affected page or widget.

The scope change indicator in the CVSS vector reflects that the injected script executes in the security context of the WordPress site rather than the vulnerable plugin alone. This allows attackers to reach administrator sessions, exfiltrate authentication cookies, and pivot to full site compromise.

Root Cause

The root cause is missing or insufficient output encoding on fields controlled by editors of Elementor content. The plugin trusts input that should be treated as untrusted, violating the principle of contextual output escaping required by the WordPress Plugin Handbook. WordPress functions such as esc_html(), esc_attr(), and wp_kses_post() are not applied consistently when rendering stored values.

Attack Vector

An attacker with a low-privilege authenticated account submits a malicious payload through a plugin-controlled input field, such as a widget setting or custom CSS-adjacent parameter. User interaction is required, meaning a victim must load the page containing the stored payload. Once triggered, the script runs with the origin of the WordPress site and can perform any action the viewing user is authorized to perform.

No verified public exploit code is available for CVE-2025-22321. Refer to the Patchstack XSS Vulnerability Advisory for additional technical context.

Detection Methods for CVE-2025-22321

Indicators of Compromise

Unexpected <script> tags, onerror=, onload=, or javascript: handlers stored within Elementor widget content in the wp_postmeta or wp_options tables
Outbound requests from visitor browsers to unknown domains originating from pages built with the ElementsCSS Addons plugin
Unauthorized administrator account creation or privilege changes shortly after a low-privilege user edits plugin-controlled content

Detection Strategies

Audit the WordPress database for stored payloads containing HTML event handlers or script tags in plugin-controlled fields
Inspect web server access logs for POST requests to admin-ajax.php or Elementor editor endpoints containing encoded script fragments
Run static scans against installed plugin versions to identify sites still running css-for-elementor version 1.0.8.9 or earlier

Monitoring Recommendations

Deploy a Web Application Firewall (WAF) with signatures for stored XSS in WordPress plugins and enable logging of blocked requests
Enable Content Security Policy (CSP) headers with strict script-src directives to alert on inline script execution
Monitor WordPress audit logs for low-privilege users editing Elementor pages or plugin settings

How to Mitigate CVE-2025-22321

Immediate Actions Required

Identify all WordPress instances running the ElementsCSS Addons for Elementor plugin and confirm the installed version
Update the plugin to a version later than 1.0.8.9 once the vendor releases a fixed release, or deactivate and remove the plugin if no patch is available
Review contributor, author, and editor accounts and reset credentials for any account suspected of being used to inject payloads

Patch Information

Consult the Patchstack XSS Vulnerability Advisory for the current patch status. At the time of publication, the advisory lists all versions through 1.0.8.9 as affected. Site operators should subscribe to vendor notifications and apply the fixed release as soon as it is published.

Workarounds

Deactivate and remove the ElementsCSS Addons for Elementor plugin until a patched version is installed
Restrict the ability to edit Elementor pages to trusted administrator accounts only using role management plugins
Deploy a virtual patching rule at the WAF layer that blocks HTML event handlers and script tags in requests targeting Elementor editor endpoints

bash

# Example WP-CLI commands to audit and disable the vulnerable plugin
wp plugin list --name=css-for-elementor --fields=name,status,version
wp plugin deactivate css-for-elementor
wp plugin delete css-for-elementor