CVE-2026-22508: Dentalux Theme Path Traversal Vulnerability

CVE-2026-22508 Overview

CVE-2026-22508 is a Local File Inclusion (LFI) vulnerability affecting the AncoraThemes Dentalux WordPress theme. This vulnerability stems from improper control of filename parameters used in PHP include or require statements, allowing attackers to manipulate file paths and potentially access sensitive files on the server or achieve remote code execution through log poisoning or other chained techniques.

Critical Impact

Unauthenticated attackers can exploit this Local File Inclusion vulnerability to read sensitive system files, potentially exposing configuration data, credentials, and enabling further exploitation paths such as remote code execution.

Affected Products

• AncoraThemes Dentalux WordPress Theme version 3.3 and earlier
• WordPress installations using vulnerable Dentalux theme versions
• Web servers hosting affected WordPress deployments

Discovery Timeline

• 2026-03-25 - CVE-2026-22508 published to NVD
• 2026-03-26 - Last updated in NVD database

Technical Details for CVE-2026-22508

Vulnerability Analysis

This vulnerability is classified under CWE-98 (Improper Control of Filename for Include/Require Statement in PHP Program). The Dentalux WordPress theme fails to properly sanitize user-controlled input before passing it to PHP's file inclusion functions. This allows an attacker to manipulate the file path parameter to include arbitrary local files from the server's filesystem.

The attack can be executed remotely over the network, though the complexity is considered high due to the specific conditions required for successful exploitation. When successfully exploited, the vulnerability can result in complete compromise of confidentiality, integrity, and availability of the affected system.

Root Cause

The root cause of this vulnerability lies in insufficient input validation and sanitization within the Dentalux theme's PHP code. When processing user-supplied input for file inclusion operations, the theme does not adequately filter or validate the filename parameter, allowing path traversal sequences and arbitrary file references to be processed by PHP's include or require functions.

Attack Vector

The vulnerability is exploitable via a network-based attack vector. An attacker can craft malicious HTTP requests containing path traversal sequences (such as ../) or absolute file paths in parameters that are subsequently used in file inclusion operations. This allows the attacker to:

1. Read sensitive configuration files such as wp-config.php containing database credentials
2. Access system files like /etc/passwd to enumerate users
3. Potentially achieve remote code execution by including files containing PHP code, such as poisoned log files or uploaded files

The vulnerability is particularly dangerous in shared hosting environments where multiple WordPress installations may be compromised through a single vulnerable theme instance.

Detection Methods for CVE-2026-22508

Indicators of Compromise

• Suspicious HTTP requests containing path traversal sequences (../, ..%2f, ....//) targeting the Dentalux theme directory
• Web server access logs showing requests attempting to access sensitive files like /etc/passwd or wp-config.php
• Unusual file access patterns in PHP error logs indicating attempts to include non-existent or restricted files
• Evidence of log file poisoning attempts in access logs with PHP code embedded in User-Agent or other HTTP headers

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block path traversal attempts in HTTP parameters
• Monitor web server logs for suspicious patterns including encoded traversal sequences and attempts to access system files
• Deploy file integrity monitoring on critical WordPress configuration files to detect unauthorized access attempts
• Utilize security plugins that monitor for known vulnerability exploitation attempts against WordPress themes

Monitoring Recommendations

• Enable detailed PHP error logging to capture file inclusion failures that may indicate exploitation attempts
• Configure real-time alerting for HTTP requests containing common LFI payloads targeting the Dentalux theme endpoints
• Review web server access logs regularly for anomalous request patterns involving the affected theme's file paths
• Monitor for unexpected outbound connections that may indicate successful exploitation and data exfiltration

How to Mitigate CVE-2026-22508

Immediate Actions Required

• Immediately update the Dentalux WordPress theme to a patched version if available from AncoraThemes
• If no patch is available, consider temporarily disabling or replacing the Dentalux theme with a secure alternative
• Implement WAF rules to block requests containing path traversal sequences targeting the affected theme
• Review web server access logs for evidence of prior exploitation attempts

Patch Information

Administrators should check with AncoraThemes for an updated version of the Dentalux theme that addresses this vulnerability. For detailed vulnerability information and patch status, refer to the Patchstack WordPress Vulnerability Analysis.

Workarounds

• Restrict access to the WordPress theme directory using web server configuration rules to limit exposure
• Implement strict input validation at the web server level using ModSecurity or similar WAF solutions with LFI detection rules
• Configure PHP open_basedir restriction to limit file access to the WordPress installation directory only
• Consider using a security plugin such as Wordfence or Sucuri to add additional layers of protection against LFI attacks

# Apache configuration to restrict directory access and enable basic LFI protection
<Directory "/var/www/html/wp-content/themes/dentalux">
    # Deny direct access to PHP files in theme subdirectories
    <FilesMatch "\.php$">
        Require all denied
    </FilesMatch>
</Directory>

# Add ModSecurity rule to block path traversal attempts
SecRule REQUEST_URI|ARGS "@rx \.\./" "id:1001,phase:1,deny,status:403,msg:'Path Traversal Attempt Blocked'"