CVE-2022-29455: Elementor Website Builder XSS Vulnerability

CVE-2022-29455 Overview

CVE-2022-29455 is a DOM-based reflected Cross-Site Scripting (XSS) vulnerability [CWE-79] in the Elementor Website Builder plugin for WordPress, affecting versions 3.5.5 and earlier. The plugin is installed on millions of WordPress sites, making the issue broadly relevant to site operators. An unauthenticated attacker can craft a URL that, when visited by a target, executes arbitrary JavaScript in the victim's browser session. The flaw enables session theft, administrative action hijacking, and content modification when an authenticated administrator is targeted.

Critical Impact
Unauthenticated attackers can execute arbitrary JavaScript in a victim's browser, potentially leading to WordPress administrator account compromise on sites running Elementor <= 3.5.5.

Affected Products

Elementor Website Builder plugin for WordPress, versions <= 3.5.5
WordPress sites with the vulnerable plugin active
All hosting environments where the affected plugin version is deployed

Discovery Timeline

2022-06-13 - CVE-2022-29455 published to NVD
2024-11-21 - Last updated in NVD database

Technical Details for CVE-2022-29455

Vulnerability Analysis

The vulnerability is a DOM-based reflected XSS issue within Elementor's client-side JavaScript handling. The plugin reads attacker-controlled data from the URL and writes it into the Document Object Model (DOM) without proper sanitization or output encoding. Because the injection occurs in the browser rather than on the server, traditional server-side filters and many web application firewall (WAF) rules fail to detect the payload.

Exploitation requires user interaction: the victim must follow a crafted link. Once triggered, the payload executes in the origin of the WordPress site, granting the attacker access to cookies, session tokens, and any application state available to the user. Targeting a logged-in administrator can result in account takeover through forced creation of new admin users or modification of plugin and theme files.

Root Cause

The root cause is improper neutralization of user input during web page generation on the client side. Elementor's JavaScript consumes URL parameters or fragment data and assigns the value to a DOM sink without HTML or JavaScript context escaping. This allows raw markup, including <script> tags or event-handler attributes, to be parsed and executed by the browser.

Attack Vector

The attack vector is network-based and unauthenticated. An attacker delivers a malicious URL through phishing, comment fields, social media, or a watering-hole page. When the victim clicks the link, the Elementor client-side code processes the attacker-supplied value and injects it into the page, where the browser executes it. The vulnerability's scope is changed because injected script runs in the WordPress site origin even though the attacker never authenticated. Technical analysis is available in the Patchstack Vulnerability Database Entry and the Rotem Bar Blog Post on CVE-2022-29455.

Detection Methods for CVE-2022-29455

Indicators of Compromise

Inbound HTTP requests containing URL parameters or fragments with encoded <script>, onerror=, onload=, or javascript: patterns targeting Elementor endpoints
Unexpected WordPress administrator accounts or modifications to user roles
Outbound browser requests to attacker-controlled domains originating from authenticated WordPress admin sessions
Unauthorized changes to plugin, theme, or post content shortly after an admin clicked an external link

Detection Strategies

Inspect web server access logs for query strings containing HTML entities, percent-encoded angle brackets, or known XSS payload signatures targeting Elementor paths
Deploy Content Security Policy (CSP) reporting to capture inline script violations that indicate injection attempts
Correlate referrer headers from external sources with subsequent privileged WordPress actions

Monitoring Recommendations

Monitor WordPress audit logs for new user creation, role changes, and option updates following admin login sessions
Alert on file integrity changes to wp-content/plugins/elementor/ and core WordPress files
Track plugin version inventories to identify hosts still running Elementor <= 3.5.5

How to Mitigate CVE-2022-29455

Immediate Actions Required

Update the Elementor Website Builder plugin to version 3.5.6 or later on every WordPress installation
Audit administrator accounts and rotate credentials and session tokens for users who may have clicked suspicious links
Review WordPress activity logs for unauthorized configuration, user, or content changes since the plugin was first installed

Patch Information

Elementor addressed the vulnerability in plugin version 3.5.6. Site administrators should apply the update through the WordPress plugin manager or by deploying the latest release from the WordPress Elementor Plugin Documentation. Sites managed through automation tooling should pin the plugin to a fixed version above 3.5.5 and verify the update across all environments.

Workarounds

Restrict access to the WordPress admin interface using IP allowlists or VPN-only access until patching is complete
Deploy a WAF rule that blocks requests containing common DOM XSS payload patterns directed at Elementor endpoints
Enforce a strict Content Security Policy that disallows inline script execution and restricts script sources to trusted origins
Train administrators to avoid clicking unsolicited links to their own WordPress site, particularly with query strings or fragments

bash

# Update Elementor via WP-CLI to the patched release
wp plugin update elementor --version=3.5.6
wp plugin list --name=elementor --fields=name,status,version