CVE-2026-4659 Overview
The Unlimited Elements for Elementor plugin for WordPress is vulnerable to Arbitrary File Read via the Repeater JSON/CSV URL parameter in versions up to, and including, 2.0.6. This vulnerability stems from insufficient path traversal sanitization in the URLtoRelative() and urlToPath() functions, combined with the ability to enable debug output in widget settings.
The URLtoRelative() function performs only a simple string replacement to remove the site's base URL without sanitizing path traversal sequences (../), and the cleanPath() function only normalizes directory separators without removing traversal components. This allows authenticated attackers with Author-level access and above to read arbitrary local files from the WordPress host, including sensitive files such as wp-config.php.
Critical Impact
Authenticated attackers can read sensitive server files including WordPress configuration files containing database credentials and authentication keys.
Affected Products
- Unlimited Elements for Elementor plugin versions up to and including 2.0.6
- WordPress installations using the vulnerable plugin versions
- Sites where attackers have Author-level or higher access
Discovery Timeline
- 2026-04-17 - CVE CVE-2026-4659 published to NVD
- 2026-04-22 - Last updated in NVD database
Technical Details for CVE-2026-4659
Vulnerability Analysis
This vulnerability is classified as CWE-22 (Path Traversal) and allows authenticated attackers to escape the intended directory structure and access arbitrary files on the server. The flaw exists in the URL-to-path conversion logic within the Unlimited Elements plugin's helper classes.
When processing URLs through the Repeater JSON/CSV URL parameter, the plugin attempts to convert external URLs to local file paths. The URLtoRelative() function strips the site's base URL from the input but fails to sanitize path traversal sequences. For example, a crafted URL like http://site.com/../../../../etc/passwd would have the domain portion removed, leaving /../../../../etc/passwd. This malicious path is then concatenated with the base WordPress path and resolved by the filesystem, ultimately accessing /etc/passwd.
The attack requires Author-level access or higher, meaning an attacker needs a valid WordPress account with content creation privileges. Combined with the debug output feature in widget settings, attackers can exfiltrate the contents of sensitive files including wp-config.php, which typically contains database credentials, authentication salts, and other security-sensitive configuration.
Root Cause
The root cause lies in incomplete input sanitization within the URLtoRelative() and cleanPath() functions. The URLtoRelative() function located in unitecreator_helper.class.php performs a simple string replacement to remove the site's base URL without validating or sanitizing the remaining path components. The cleanPath() function normalizes directory separators but does not strip or block path traversal sequences like ../. This allows attackers to construct URLs that, once processed, resolve to file paths outside the intended WordPress directory.
Attack Vector
The attack is executed over the network and requires authentication with at least Author-level privileges. An attacker would craft a malicious URL containing path traversal sequences in the Repeater JSON/CSV URL parameter of a widget. By enabling debug output in widget settings, the attacker can view the contents of arbitrary files read by the plugin.
The attack flow involves:
- Authenticating to WordPress with Author-level or higher credentials
- Accessing a widget that uses the Repeater JSON/CSV functionality
- Providing a crafted URL containing path traversal sequences (e.g., http://site.com/../../../../etc/passwd)
- Enabling debug output to view the exfiltrated file contents
For technical implementation details, refer to the Wordfence Vulnerability Report and the vulnerable source code in unitecreator_helper.class.php.
Detection Methods for CVE-2026-4659
Indicators of Compromise
- Unusual file access patterns in web server logs targeting paths containing ../ sequences
- Access logs showing requests to widget endpoints with URL parameters containing path traversal patterns
- Unexpected reads of sensitive files like /etc/passwd, /etc/shadow, or wp-config.php by the web server process
- Debug output enabled unexpectedly in Unlimited Elements widget configurations
Detection Strategies
- Monitor web application firewall (WAF) logs for path traversal patterns in request parameters
- Implement file integrity monitoring on sensitive configuration files like wp-config.php
- Review WordPress user activity logs for Author-level users accessing Unlimited Elements widget settings
- Deploy intrusion detection rules to alert on requests containing encoded or plaintext path traversal sequences
Monitoring Recommendations
- Enable verbose logging for the Unlimited Elements plugin if available
- Configure server-side monitoring to detect file reads outside the WordPress installation directory
- Implement real-time alerting for access to sensitive system files by the web server user
- Regularly audit user accounts with Author-level or higher privileges
How to Mitigate CVE-2026-4659
Immediate Actions Required
- Update Unlimited Elements for Elementor plugin to a version newer than 2.0.6 immediately
- Audit WordPress user accounts and revoke unnecessary Author-level or higher privileges
- Review server logs for evidence of exploitation attempts
- Rotate any credentials that may have been exposed, including database passwords and WordPress authentication keys in wp-config.php
Patch Information
A security update addressing this vulnerability is available through the WordPress plugin repository. The fix can be reviewed in the WordPress Changeset Update. Site administrators should update the Unlimited Elements for Elementor plugin to the latest available version.
Workarounds
- Temporarily disable the Unlimited Elements for Elementor plugin until the update can be applied
- Restrict Author-level account access to trusted users only
- Implement web application firewall rules to block requests containing path traversal patterns (../)
- Configure server-level restrictions to prevent the web server process from reading files outside the WordPress directory
# Example: Block path traversal patterns in Apache .htaccess
RewriteEngine On
RewriteCond %{QUERY_STRING} (\.\./|\.\.\\) [NC,OR]
RewriteCond %{REQUEST_URI} (\.\./|\.\.\\) [NC]
RewriteRule .* - [F,L]
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
