CVE-2026-27335: Ekoterra WordPress Theme Path Traversal

CVE-2026-27335 Overview

CVE-2026-27335 is a PHP Local File Inclusion (LFI) vulnerability discovered in the AncoraThemes Ekoterra WordPress theme, a premium theme designed for nonprofit, green energy, and ecology-focused websites. 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 is classified under CWE-98 (Improper Control of Filename for Include/Require Statement in PHP Program), which encompasses both remote and local file inclusion attack vectors. In this case, the vulnerability enables local file inclusion, potentially exposing sensitive server files, configuration data, and in some scenarios, enabling code execution through log poisoning or other advanced techniques.

Critical Impact

Attackers can exploit this LFI vulnerability to read sensitive files from the web server, potentially exposing database credentials, WordPress configuration files, and other sensitive data stored on the system.

Affected Products

• Ekoterra - NonProfit, Green Energy & Ecology Theme version 1.0.0 and earlier
• WordPress installations running vulnerable Ekoterra theme versions
• Web servers hosting WordPress sites with the Ekoterra theme installed

Discovery Timeline

• 2026-03-05 - CVE-2026-27335 published to NVD
• 2026-03-05 - Last updated in NVD database

Technical Details for CVE-2026-27335

Vulnerability Analysis

The Ekoterra WordPress theme by AncoraThemes contains a Local File Inclusion vulnerability that results from insufficient validation and sanitization of user-supplied input when processing file paths in PHP include or require statements. This vulnerability allows an attacker to manipulate file path parameters to include local files from the server's filesystem.

Local File Inclusion vulnerabilities in PHP applications occur when the application dynamically includes files based on user input without proper validation. In the context of WordPress themes, this typically manifests in template loading functions, AJAX handlers, or custom functionality that processes file paths.

The impact of this vulnerability extends beyond simple file disclosure. Attackers may leverage LFI to:

• Read sensitive configuration files such as wp-config.php containing database credentials
• Access server logs that may contain injected malicious code
• Enumerate server directories and file structures
• Potentially achieve remote code execution through techniques like log poisoning or PHP filter chains

Root Cause

The root cause of CVE-2026-27335 lies in the theme's failure to properly validate and sanitize user-controlled input before using it in PHP include or require statements. The vulnerable code path accepts external input—likely through GET, POST parameters, or AJAX requests—and uses this input to construct file paths without adequately restricting the allowed values or sanitizing directory traversal sequences.

WordPress themes should implement strict allowlisting of includable files, use absolute paths, and validate that requested files exist within the expected theme directory structure. The Ekoterra theme's implementation lacks these security controls.

Attack Vector

An attacker can exploit this vulnerability by crafting malicious requests that manipulate the file path parameter to traverse directories and include arbitrary files. The attack typically involves using directory traversal sequences such as ../ to escape the intended directory and access files elsewhere on the filesystem.

Common targets for LFI attacks against WordPress installations include the wp-config.php file (containing database credentials), /etc/passwd (to enumerate system users), and web server access logs (for potential log poisoning attacks). The attacker does not require authentication to exploit this vulnerability, making it accessible to any remote attacker who can send HTTP requests to the vulnerable WordPress installation.

For technical details on the vulnerability mechanism and affected code paths, refer to the Patchstack security advisory.

Detection Methods for CVE-2026-27335

Indicators of Compromise

• HTTP requests containing directory traversal patterns (../, ..%2f, %2e%2e/) targeting Ekoterra theme endpoints
• Access attempts to sensitive files through theme parameters (e.g., wp-config.php, /etc/passwd)
• Unusual file access patterns in web server logs referencing theme directories
• PHP errors or warnings related to file inclusion failures in error logs

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block directory traversal patterns in requests to WordPress theme endpoints
• Monitor web server access logs for requests containing path traversal sequences targeting the Ekoterra theme
• Configure intrusion detection systems to alert on attempts to access sensitive system files through web requests
• Deploy file integrity monitoring to detect unauthorized access to configuration files

Monitoring Recommendations

• Enable detailed logging for WordPress and PHP to capture file inclusion attempts
• Configure real-time alerting for requests containing common LFI payloads
• Monitor for unusual outbound data exfiltration that may indicate successful exploitation
• Review web server access logs regularly for suspicious patterns targeting theme directories

How to Mitigate CVE-2026-27335

Immediate Actions Required

• Update the Ekoterra theme to the latest patched version when available from AncoraThemes
• If no patch is available, consider temporarily disabling or replacing the Ekoterra theme with a secure alternative
• Implement WAF rules to block directory traversal patterns targeting WordPress theme endpoints
• Review server logs for evidence of exploitation attempts

Patch Information

Security researchers at Patchstack have documented this vulnerability. WordPress site administrators should check the Patchstack vulnerability database for updates on patch availability and remediation guidance from the theme vendor.

Site administrators running Ekoterra theme version 1.0.0 or earlier should contact AncoraThemes directly for patch information or consider using an alternative theme until a security update is released.

Workarounds

• Implement server-level restrictions using .htaccess or web server configuration to block requests containing path traversal sequences
• Deploy a Web Application Firewall with rules to detect and block LFI attack patterns
• Restrict PHP's open_basedir directive to limit file access to the WordPress installation directory
• Consider implementing additional input validation at the server level using ModSecurity or similar solutions

# Example .htaccess rules to block common LFI patterns
# Add to WordPress root .htaccess file

<IfModule mod_rewrite.c>
RewriteEngine On
# Block directory traversal attempts
RewriteCond %{QUERY_STRING} (\.\./|\.\.) [NC,OR]
RewriteCond %{QUERY_STRING} (\.\.%2f|%2e%2e) [NC,OR]
RewriteCond %{QUERY_STRING} (etc/passwd|wp-config) [NC]
RewriteRule .* - [F,L]
</IfModule>