CVE-2026-22377: Saveo Theme File Inclusion Vulnerability

CVE-2026-22377 Overview

A PHP Local File Inclusion (LFI) vulnerability exists in the AncoraThemes Saveo WordPress theme through version 1.1.2. This vulnerability stems from improper control of filename parameters used in PHP include/require statements, allowing attackers to include arbitrary local files on the server.

Critical Impact

Remote attackers can exploit this vulnerability to read sensitive files, potentially leading to information disclosure, configuration exposure, and in some scenarios, remote code execution through log poisoning or other LFI-to-RCE techniques.

Affected Products

• AncoraThemes Saveo WordPress Theme versions up to and including 1.1.2
• WordPress installations using the vulnerable Saveo theme
• Web servers hosting WordPress sites with the affected theme installed

Discovery Timeline

• February 20, 2026 - CVE-2026-22377 published to NVD
• February 24, 2026 - Last updated in NVD database

Technical Details for CVE-2026-22377

Vulnerability Analysis

This vulnerability is classified as CWE-98: Improper Control of Filename for Include/Require Statement in PHP Program. The Saveo WordPress theme fails to properly sanitize user-supplied input before using it in PHP file inclusion functions such as include(), include_once(), require(), or require_once().

Local File Inclusion vulnerabilities in WordPress themes are particularly dangerous because they can allow attackers to read sensitive files such as wp-config.php (containing database credentials), access server configuration files, or leverage other techniques to achieve code execution.

The attack requires network access but involves high complexity, indicating that exploitation may require specific conditions or configurations to be successful. However, successful exploitation requires no privileges or user interaction, making it a significant threat to vulnerable installations.

Root Cause

The root cause lies in the theme's failure to validate and sanitize user-controllable input before passing it to PHP file inclusion functions. The theme likely accepts file path parameters through HTTP requests without implementing proper input validation, path canonicalization, or allowlist-based filtering to restrict which files can be included.

Attack Vector

The vulnerability is exploitable over the network by unauthenticated attackers. The attack typically involves manipulating URL parameters or form inputs to inject directory traversal sequences (e.g., ../) combined with target file paths. This allows attackers to break out of the intended directory and access arbitrary files on the web server.

Common exploitation patterns for LFI vulnerabilities include:

• Reading sensitive configuration files using traversal sequences such as ../../wp-config.php
• Accessing system files like /etc/passwd to enumerate users
• Leveraging PHP wrappers (e.g., php://filter) for source code disclosure
• Combining with log poisoning techniques to achieve remote code execution

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

Detection Methods for CVE-2026-22377

Indicators of Compromise

• Web server logs containing directory traversal sequences (../, ..%2f, ..%252f) in requests to the Saveo theme
• Requests attempting to access sensitive files such as /etc/passwd, wp-config.php, or .htaccess through theme endpoints
• Unusual access patterns to theme-related PHP files with suspicious query parameters
• PHP wrapper usage in URL parameters (e.g., php://filter, php://input)

Detection Strategies

• Monitor web application firewall (WAF) logs for path traversal and LFI attack patterns targeting WordPress theme directories
• Implement file integrity monitoring on WordPress core files and theme configurations
• Review web server access logs for unusual request patterns involving the Saveo theme
• Deploy intrusion detection rules that alert on common LFI payload patterns

Monitoring Recommendations

• Enable verbose logging for WordPress and monitor for file inclusion errors or warnings
• Configure alerts for access attempts to sensitive system files from web application contexts
• Implement centralized log aggregation to correlate potential attack attempts across multiple servers
• Monitor for new file creation in web-accessible directories that could indicate successful exploitation

How to Mitigate CVE-2026-22377

Immediate Actions Required

• Update the Saveo WordPress theme to the latest patched version if available from AncoraThemes
• If no patch is available, consider temporarily disabling or removing the Saveo theme and switching to an alternative
• Implement Web Application Firewall (WAF) rules to block common LFI attack patterns
• Restrict file system permissions to limit what files the web server user can read

Patch Information

Organizations should check the Patchstack Vulnerability Report for the latest patch status and remediation guidance from AncoraThemes. Contact the theme vendor directly for updated versions that address this vulnerability.

Workarounds

• Implement strict WAF rules to block requests containing directory traversal sequences and PHP wrapper protocols
• Apply the principle of least privilege to web server processes, limiting readable files
• Use open_basedir PHP directive to restrict file inclusion to specific directories
• Consider using virtual patching through security plugins until an official fix is available

# Example: Add .htaccess rules to block common LFI patterns
# Place in WordPress root directory

<IfModule mod_rewrite.c>
    RewriteEngine On
    # Block common directory traversal patterns
    RewriteCond %{QUERY_STRING} (\.\./|\.\.%2f|\.\.%252f) [NC,OR]
    RewriteCond %{QUERY_STRING} (php://|data://|expect://|zip://) [NC]
    RewriteRule .* - [F,L]
</IfModule>