CVE-2026-28125: Midi Theme Local File Inclusion Vulnerability

CVE-2026-28125 Overview

CVE-2026-28125 is a Local File Inclusion (LFI) vulnerability discovered in the AncoraThemes Midi WordPress theme. The vulnerability stems from improper control of filename for include/require statements in PHP, classified under CWE-98 (Improper Control of Filename for Include/Require Statement in PHP Program). This weakness allows attackers to manipulate file paths used in PHP include or require statements, potentially gaining access to sensitive files on the server or achieving remote code execution under certain conditions.

Critical Impact

Attackers exploiting this vulnerability can read arbitrary files from the web server, potentially accessing configuration files containing database credentials, API keys, and other sensitive information. In scenarios where file upload functionality exists or log poisoning is possible, this LFI vulnerability could be escalated to achieve remote code execution.

Affected Products

• AncoraThemes Midi WordPress Theme version 1.14 and earlier
• WordPress installations using the Midi theme
• Web servers hosting vulnerable Midi theme installations

Discovery Timeline

• 2026-03-05 - CVE-2026-28125 published to NVD
• 2026-03-05 - Last updated in NVD database

Technical Details for CVE-2026-28125

Vulnerability Analysis

The vulnerability exists due to insufficient validation and sanitization of user-controlled input that is passed to PHP's include(), require(), include_once(), or require_once() functions within the Midi theme. When the theme processes certain requests, it fails to properly validate or sanitize the file path parameter, allowing an attacker to manipulate the path and include arbitrary files from the server's filesystem.

This type of vulnerability is particularly dangerous in WordPress environments where themes often handle template loading, partial includes, and dynamic content rendering. The attack can be conducted over the network without requiring authentication, though exploitation complexity is considered high due to the specific conditions required for successful exploitation.

Root Cause

The root cause of CVE-2026-28125 lies in the improper handling of user-supplied input that directly influences which files are included by PHP code within the Midi theme. The theme fails to implement adequate input validation, path canonicalization, or whitelist-based file inclusion controls. This allows attackers to use path traversal sequences (such as ../) to navigate outside the intended directory structure and include sensitive system files or other PHP files that could lead to code execution.

Attack Vector

The attack is conducted over the network, requiring the attacker to craft malicious HTTP requests targeting the vulnerable endpoint in the Midi theme. The exploitation scenario typically involves:

1. Identifying the vulnerable parameter that controls file inclusion
2. Crafting a request with path traversal sequences to target sensitive files
3. Accessing files such as /etc/passwd, wp-config.php, or other configuration files
4. Potentially chaining with log poisoning or file upload vulnerabilities to achieve remote code execution

The vulnerability does not require authentication or user interaction to exploit, making it accessible to unauthenticated remote attackers. However, the high attack complexity rating indicates that specific conditions must be met for successful exploitation.

Detection Methods for CVE-2026-28125

Indicators of Compromise

• Unusual HTTP requests containing path traversal sequences (../, ..%2f, ..%252f) targeting the Midi theme directory
• Access log entries showing requests for sensitive files like /etc/passwd or wp-config.php through theme endpoints
• Unexpected file access patterns in PHP include/require operations logged by web server or application monitoring

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block path traversal attempts in URL parameters
• Monitor PHP error logs for include/require failures that may indicate exploitation attempts
• Deploy file integrity monitoring on the WordPress installation to detect unauthorized file access or modifications
• Review access logs for requests containing encoded traversal sequences targeting the Midi theme

Monitoring Recommendations

• Enable detailed logging for the WordPress installation and web server
• Configure alerting for patterns matching LFI attack signatures in HTTP request parameters
• Monitor for unusual access to sensitive configuration files from web server processes
• Implement real-time log analysis to detect path traversal attempts

How to Mitigate CVE-2026-28125

Immediate Actions Required

• Update the AncoraThemes Midi theme to a patched version if available from the vendor
• If no patch is available, consider temporarily disabling or removing the Midi theme
• Implement WAF rules to block path traversal attempts targeting the theme
• Review server access logs for evidence of exploitation attempts
• Audit the WordPress installation for any signs of compromise

Patch Information

Organizations using the AncoraThemes Midi WordPress theme should check for updates through the official theme vendor channels. The Patchstack WordPress Vulnerability Analysis provides additional details about this vulnerability. Until an official patch is released, implement the recommended workarounds and mitigations to reduce exposure.

Workarounds

• Deploy a Web Application Firewall with rules specifically blocking LFI attack patterns
• Implement open_basedir restrictions in PHP configuration to limit accessible directories
• Use the Patchstack WordPress security plugin for virtual patching capabilities
• Consider switching to an alternative WordPress theme until a security update is released
• Apply principle of least privilege to web server file permissions to limit potential impact