CVE-2026-22415: The Mounty Path Traversal Vulnerability

CVE-2026-22415 Overview

CVE-2026-22415 is a PHP Local File Inclusion (LFI) vulnerability affecting AncoraThemes' "The Mounty" WordPress theme. 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 flaw could enable attackers to read sensitive configuration files, access credentials, or potentially achieve remote code execution if combined with other techniques such as log poisoning.

Critical Impact

This Local File Inclusion vulnerability in The Mounty WordPress theme allows attackers to read sensitive server files and potentially escalate to remote code execution through file inclusion chains.

Affected Products

• AncoraThemes The Mounty WordPress Theme version 1.1 and earlier
• WordPress installations using The Mounty theme (the-mounty)

Discovery Timeline

• 2026-03-05 - CVE-2026-22415 published to NVD
• 2026-03-05 - Last updated in NVD database

Technical Details for CVE-2026-22415

Vulnerability Analysis

This vulnerability is classified under CWE-98 (Improper Control of Filename for Include/Require Statement in PHP Program). The Mounty WordPress theme fails to properly sanitize user-supplied input before using it in PHP include() or require() statements. This allows an attacker to manipulate file path parameters to include arbitrary local files from the web server's filesystem.

Local File Inclusion vulnerabilities in WordPress themes are particularly dangerous because they can expose sensitive WordPress configuration files like wp-config.php, which contains database credentials and authentication keys. Additionally, attackers may leverage LFI to read system files such as /etc/passwd on Linux servers or Windows configuration files.

Root Cause

The root cause of this vulnerability lies in insufficient input validation within The Mounty theme's PHP code. The theme accepts user-controlled parameters that are directly passed to file inclusion functions without proper sanitization or path restriction. The absence of allowlist validation, path canonicalization, and directory traversal filtering enables attackers to specify arbitrary file paths.

Attack Vector

Exploitation of this vulnerability typically involves manipulating URL parameters or POST data to inject directory traversal sequences (such as ../) into the file path parameter. An attacker can craft malicious requests that traverse out of the intended directory and include sensitive files from anywhere on the server's filesystem.

The attack flow generally follows this pattern:

1. Attacker identifies a vulnerable parameter that controls file inclusion
2. Attacker injects path traversal sequences to navigate to target files
3. The PHP engine includes the specified file, potentially exposing its contents
4. If combined with log poisoning or file upload vulnerabilities, remote code execution becomes possible

For detailed technical analysis and proof-of-concept information, refer to the Patchstack WordPress Vulnerability Report.

Detection Methods for CVE-2026-22415

Indicators of Compromise

• Unusual HTTP requests containing directory traversal sequences (../, ..%2f, %2e%2e/) targeting The Mounty theme files
• Web server logs showing attempts to access sensitive files like /etc/passwd, wp-config.php, or Windows system files
• Requests to theme endpoints with path manipulation patterns in query parameters
• Unexpected file read operations from the web server process

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block path traversal patterns in requests targeting WordPress theme directories
• Monitor web server access logs for requests containing encoded or unencoded traversal sequences
• Deploy file integrity monitoring to detect unauthorized access to sensitive configuration files
• Use intrusion detection systems with signatures for PHP LFI attack patterns

Monitoring Recommendations

• Enable detailed logging for WordPress and web server access logs
• Configure alerts for requests containing suspicious path traversal characters targeting /wp-content/themes/the-mounty/
• Monitor for unusual file system access patterns from the web server process
• Review PHP error logs for failed include/require operations that may indicate exploitation attempts

How to Mitigate CVE-2026-22415

Immediate Actions Required

• Deactivate and remove The Mounty theme if it is not actively required
• Update The Mounty theme to a patched version when available from AncoraThemes
• Implement WAF rules to block path traversal attack patterns targeting WordPress themes
• Review server access logs for evidence of exploitation attempts

Patch Information

Organizations using The Mounty WordPress theme should check with AncoraThemes for an updated version that addresses this vulnerability. Monitor the Patchstack vulnerability report for patch availability updates.

Until a patch is available, consider the following workarounds to reduce exposure.

Workarounds

• Replace The Mounty theme with an alternative theme that is not affected by this vulnerability
• Implement strict input validation at the web server or application firewall level to block traversal sequences
• Restrict file system permissions to limit what the web server process can access
• Use open_basedir PHP directive to restrict file access to the WordPress installation directory
• Configure ModSecurity or similar WAF with rules to detect and block LFI attempts

# Example Apache ModSecurity rule to block path traversal
SecRule REQUEST_URI|ARGS|REQUEST_BODY "@contains ../" \
    "id:100001,phase:2,deny,status:403,msg:'Path Traversal Attempt Blocked'"

# PHP open_basedir restriction (add to php.ini or .htaccess)
php_admin_value open_basedir "/var/www/html/wordpress:/tmp"