CVE-2026-27079: Amfissa Path Traversal Vulnerability

CVE-2026-27079 Overview

CVE-2026-27079 is a Local File Inclusion (LFI) vulnerability affecting the Amfissa WordPress theme by Mikado-Themes. The vulnerability stems from improper control of filename parameters used in PHP include/require statements, which allows attackers to manipulate file paths and potentially include malicious files from the local file system.

This vulnerability is classified under CWE-98 (Improper Control of Filename for Include/Require Statement in PHP Program), indicating that the application fails to properly sanitize user-controlled input before using it in file inclusion operations.

Critical Impact

Successful exploitation could allow unauthenticated remote attackers to read sensitive files, execute arbitrary PHP code, and potentially gain full control of the affected WordPress installation.

Affected Products

• Mikado-Themes Amfissa WordPress Theme version 1.1 and earlier
• All versions from initial release through version 1.1
• WordPress installations using the vulnerable Amfissa theme

Discovery Timeline

• 2026-03-25 - CVE-2026-27079 published to NVD
• 2026-03-26 - Last updated in NVD database

Technical Details for CVE-2026-27079

Vulnerability Analysis

The vulnerability exists in the Amfissa WordPress theme where user-supplied input is passed to PHP's include() or require() functions without adequate validation or sanitization. PHP Local File Inclusion vulnerabilities occur when an attacker can manipulate file path parameters to force the application to include files from unexpected locations on the server.

In WordPress themes, this type of vulnerability often manifests in template loading mechanisms, AJAX handlers, or custom functionality that dynamically includes PHP files based on user input. The network-accessible nature of this vulnerability means it can be exploited remotely without requiring authentication, though the attack complexity is considered high.

Root Cause

The root cause of this vulnerability is the failure to properly validate and sanitize user-controlled input before using it in PHP file inclusion operations. The theme does not implement adequate path traversal protection, allowlisting of permitted files, or input filtering to prevent directory traversal sequences (such as ../) from being processed.

Common contributing factors include:

• Missing input validation on file path parameters
• Lack of base directory enforcement
• Absence of file extension restrictions
• Failure to use secure file inclusion patterns

Attack Vector

The attack vector is network-based, allowing remote attackers to exploit this vulnerability over the internet. An attacker would typically craft malicious HTTP requests containing path traversal sequences to navigate outside the intended directory structure and include sensitive files.

Exploitation commonly follows this pattern: the attacker identifies an endpoint or parameter that accepts file path input, then injects directory traversal sequences to access files such as /etc/passwd, WordPress configuration files (wp-config.php), or other sensitive system files. In some cases, attackers may also attempt to include log files that have been poisoned with PHP code, leading to remote code execution.

The vulnerability documentation indicates this affects URL-accessible functionality in the theme, making it exploitable by unauthenticated attackers in a default WordPress configuration.

Detection Methods for CVE-2026-27079

Indicators of Compromise

• Web server access logs showing requests with path traversal sequences (../, ..%2f, %2e%2e/) targeting the Amfissa theme
• Unusual file access patterns in PHP error logs indicating attempts to include system files
• Requests containing encoded directory traversal patterns targeting theme-specific endpoints
• Unexpected access to sensitive configuration files from web application processes

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block requests containing path traversal patterns
• Monitor web server logs for suspicious requests targeting the /wp-content/themes/amfissa/ directory path
• Deploy file integrity monitoring on critical WordPress and system configuration files
• Use intrusion detection systems (IDS) with signatures for PHP LFI attack patterns

Monitoring Recommendations

• Enable detailed access logging for WordPress installations and review regularly for anomalous patterns
• Set up alerts for HTTP requests containing common LFI payloads such as ../, null bytes, or wrapper prefixes
• Monitor PHP error logs for failed file inclusion attempts indicating exploitation attempts
• Implement real-time log analysis to correlate multiple suspicious requests from the same source

How to Mitigate CVE-2026-27079

Immediate Actions Required

• If the Amfissa theme is installed, consider temporarily disabling or replacing it until a patch is available
• Implement WAF rules to block requests containing path traversal sequences targeting the theme
• Review server access logs for signs of prior exploitation attempts
• Restrict file system permissions for the web server user to minimize potential impact

Patch Information

As of the last NVD update on 2026-03-26, no official patch has been confirmed in the available vulnerability data. Website administrators should check the Patchstack WordPress Vulnerability Database for the latest patch status and remediation guidance from the vendor.

Contact Mikado-Themes directly for updated versions of the Amfissa theme that address this vulnerability. Until a patch is available, implementing the workarounds below is strongly recommended.

Workarounds

• Deploy a web application firewall (WAF) with rules specifically blocking path traversal patterns in requests to the Amfissa theme directory
• Implement PHP open_basedir restrictions to limit file access to the WordPress installation directory
• If feasible, switch to an alternative WordPress theme that is actively maintained and not affected by this vulnerability
• Use ModSecurity or similar solutions with OWASP Core Rule Set to provide additional protection against LFI attacks

# Example ModSecurity rule to help block LFI attempts
SecRule REQUEST_URI "@contains /wp-content/themes/amfissa/" \
    "id:1001,\
    phase:1,\
    deny,\
    status:403,\
    log,\
    msg:'Potential LFI attempt blocked on Amfissa theme',\
    chain"
    SecRule ARGS "@rx (\.\./|\.\.\\\\)" ""