CVE-2026-27048: The Aisle Core Path Traversal Vulnerability

CVE-2026-27048 Overview

CVE-2026-27048 is a PHP Local File Inclusion (LFI) vulnerability in The Aisle Core WordPress plugin (theaisle-core) developed by Elated-Themes. The vulnerability stems from improper control of filename parameters used in PHP include/require statements, allowing attackers to include arbitrary local files from the server.

This vulnerability enables unauthenticated remote attackers to potentially read sensitive files, execute arbitrary PHP code, or escalate their access within the WordPress installation. Given the network-accessible nature of WordPress sites and the potential for complete system compromise, this vulnerability poses significant risk to affected installations.

Critical Impact

Unauthenticated attackers can exploit this Local File Inclusion vulnerability to read sensitive configuration files, potentially exposing database credentials, and may achieve remote code execution through log poisoning or other LFI-to-RCE techniques.

Affected Products

• The Aisle Core WordPress Plugin versions up to and including 2.0.5
• WordPress installations using the theaisle-core plugin
• Websites using The Aisle theme by Elated-Themes

Discovery Timeline

• 2026-03-25 - CVE-2026-27048 published to NVD
• 2026-03-26 - Last updated in NVD database

Technical Details for CVE-2026-27048

Vulnerability Analysis

This vulnerability is classified under CWE-98 (Improper Control of Filename for Include/Require Statement in PHP Program). The Aisle Core plugin fails to properly validate or sanitize user-supplied input before passing it to PHP's include(), require(), include_once(), or require_once() functions.

The attack can be executed remotely over the network, though the exploitation complexity is high due to conditions that must be met for successful exploitation. When successfully exploited, the vulnerability can lead to complete compromise of confidentiality, integrity, and availability of the affected system.

Local File Inclusion vulnerabilities in WordPress plugins are particularly dangerous because they can expose the wp-config.php file containing database credentials, authentication salts, and other sensitive configuration data. Additionally, attackers may chain LFI with other techniques such as log poisoning or PHP filter wrappers to achieve remote code execution.

Root Cause

The root cause of this vulnerability is inadequate input validation in The Aisle Core plugin. When the plugin processes requests that include file paths, it fails to properly sanitize or validate these paths before using them in PHP include statements. This allows an attacker to manipulate the file path parameter to traverse directories and include files outside the intended scope.

Specifically, the plugin does not implement sufficient checks to:

• Restrict included files to a specific directory
• Validate that the requested file is an allowed type
• Prevent directory traversal sequences (e.g., ../)
• Block null byte injection or path truncation attempts

Attack Vector

An attacker can exploit this vulnerability by sending specially crafted HTTP requests to the WordPress site. The attack vector is network-based, requiring no authentication and no user interaction. The attacker manipulates parameters that control which files are included by the PHP interpreter.

Typical exploitation involves:

1. Identifying vulnerable endpoints in the theaisle-core plugin that accept file path input
2. Crafting malicious requests with directory traversal sequences to reach sensitive files
3. Extracting sensitive information such as wp-config.php contents
4. Potentially escalating to remote code execution via techniques such as log file poisoning, PHP filter wrapper exploitation, or including uploaded files

For detailed technical information about this vulnerability, refer to the Patchstack Vulnerability Report.

Detection Methods for CVE-2026-27048

Indicators of Compromise

• HTTP requests to the WordPress site containing directory traversal sequences (../, ..%2f, %2e%2e/) targeting The Aisle Core plugin endpoints
• Web server logs showing access attempts to sensitive files like /etc/passwd, wp-config.php, or .htaccess via plugin parameters
• Unusual file read activity or error messages related to file inclusion in PHP error logs
• Requests with PHP filter wrapper patterns (e.g., php://filter/convert.base64-encode/resource=)

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block requests containing path traversal patterns targeting the theaisle-core plugin
• Monitor web server access logs for suspicious requests with .. sequences or encoded traversal patterns
• Implement file integrity monitoring for critical WordPress files to detect unauthorized access or modifications
• Use security plugins that detect and alert on LFI exploitation attempts

Monitoring Recommendations

• Enable detailed logging for PHP errors and web server access logs to capture exploitation attempts
• Configure real-time alerting for requests matching LFI attack signatures targeting WordPress plugin directories
• Monitor for unusual process spawning or file access patterns that may indicate successful exploitation
• Review WordPress audit logs for unexpected file reads or configuration access

How to Mitigate CVE-2026-27048

Immediate Actions Required

• Update The Aisle Core plugin to a patched version immediately if one is available from Elated-Themes
• If no patch is available, temporarily deactivate and remove the theaisle-core plugin until a fix is released
• Implement WAF rules to block requests containing directory traversal patterns targeting the vulnerable plugin
• Review server logs for any signs of prior exploitation attempts

Patch Information

The vulnerability affects The Aisle Core plugin versions through 2.0.5. Site administrators should check for updates from Elated-Themes and apply any security patches as soon as they become available. Monitor the Patchstack Vulnerability Report for updates on patch availability.

Workarounds

• Disable The Aisle Core plugin until an official patch is available
• Implement server-level restrictions using .htaccess or nginx configuration to block access to vulnerable endpoints
• Configure PHP's open_basedir directive to restrict file inclusion to the WordPress installation directory
• Enable WordPress application-level firewall plugins that can detect and block LFI attempts

# Example .htaccess rule to block path traversal attempts
<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteCond %{QUERY_STRING} (\.\./|\.\.%2f) [NC,OR]
    RewriteCond %{QUERY_STRING} (php://|file://|data://) [NC]
    RewriteRule .* - [F,L]
</IfModule>