CVE-2026-28060: ThemeREX S.King File Inclusion Vulnerability

CVE-2026-28060 Overview

CVE-2026-28060 is a PHP Local File Inclusion (LFI) vulnerability affecting the ThemeREX S.King (stephanie-king) 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's filesystem.

This type of vulnerability can enable attackers to read sensitive configuration files, access credentials stored on the server, and potentially escalate to remote code execution by including log files containing injected PHP code.

Critical Impact

Attackers can exploit this Local File Inclusion vulnerability to read sensitive server files, potentially exposing database credentials, API keys, and other confidential information. In certain configurations, this could be chained with other techniques to achieve remote code execution.

Affected Products

• ThemeREX S.King (stephanie-king) WordPress Theme versions up to and including 1.5.3
• WordPress installations running the vulnerable S.King theme

Discovery Timeline

• March 5, 2026 - CVE-2026-28060 published to NVD
• March 5, 2026 - Last updated in NVD database

Technical Details for CVE-2026-28060

Vulnerability Analysis

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

When user-supplied data is passed directly to these functions without adequate validation, attackers can manipulate file paths to traverse directories and include arbitrary files from the local filesystem. This can expose sensitive files such as wp-config.php, .htaccess, or server configuration files.

The network-accessible attack vector means exploitation can occur remotely through crafted HTTP requests to the WordPress installation.

Root Cause

The root cause of CVE-2026-28060 lies in insufficient input validation and sanitization of file path parameters within the S.King theme. The theme accepts user-controlled input that influences which PHP files are included during page rendering. Without proper sanitization measures such as:

• Whitelisting allowed file paths
• Stripping directory traversal sequences (e.g., ../)
• Validating against a predefined set of includable files

The application allows attackers to escape the intended directory scope and access files elsewhere on the server.

Attack Vector

The vulnerability is exploitable over the network without authentication. Attackers can craft malicious HTTP requests containing directory traversal sequences to manipulate the file inclusion path. A typical attack flow involves:

1. Identifying a vulnerable parameter that accepts file path input
2. Injecting directory traversal sequences to navigate the filesystem
3. Targeting sensitive files such as WordPress configuration files or system files
4. Potentially chaining with log poisoning techniques to achieve code execution

The attack does not require user interaction and can be automated for mass exploitation of vulnerable WordPress installations.

For detailed technical information about the vulnerability mechanism and exploitation patterns, refer to the Patchstack Vulnerability Report.

Detection Methods for CVE-2026-28060

Indicators of Compromise

• Unusual HTTP requests containing directory traversal sequences (../, ..%2f, %2e%2e/) targeting theme endpoints
• Access log entries showing attempts to include system files like /etc/passwd or wp-config.php
• Error logs indicating failed file inclusion attempts with suspicious paths
• Unexpected file access patterns originating from web server processes

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block path traversal patterns in request parameters
• Monitor web server access logs for requests containing encoded or plain directory traversal sequences
• Implement file integrity monitoring to detect unauthorized access to sensitive configuration files
• Use endpoint detection solutions to identify anomalous file read operations by PHP processes

Monitoring Recommendations

• Enable verbose logging for WordPress and theme-related activities
• Configure real-time alerting for path traversal attack signatures
• Monitor for unusual outbound data transfers that may indicate successful data exfiltration
• Review web server logs regularly for patterns consistent with LFI exploitation attempts

How to Mitigate CVE-2026-28060

Immediate Actions Required

• Update the S.King (stephanie-king) theme to a patched version if available from ThemeREX
• If no patch is available, consider temporarily deactivating the theme and switching to a secure alternative
• Implement WAF rules to block path traversal attempts at the network perimeter
• Review server logs for evidence of prior exploitation attempts

Patch Information

Organizations using the affected S.King WordPress theme should check for updates from ThemeREX. For the latest patch information and remediation guidance, consult the Patchstack Vulnerability Report.

It is recommended to keep all WordPress themes and plugins updated to their latest versions and to subscribe to security advisories from theme vendors.

Workarounds

• Implement server-level restrictions using open_basedir PHP directive to limit file access scope
• Deploy mod_security or similar WAF with path traversal detection rules enabled
• Restrict direct access to theme PHP files via .htaccess rules where possible
• Consider using a security plugin that provides virtual patching capabilities for WordPress vulnerabilities

# Apache .htaccess configuration to restrict directory traversal
# Add to WordPress root .htaccess file

<IfModule mod_rewrite.c>
    RewriteEngine On
    # Block requests with directory traversal patterns
    RewriteCond %{QUERY_STRING} (\.\./|\.\.\\) [NC,OR]
    RewriteCond %{REQUEST_URI} (\.\./|\.\.\\) [NC]
    RewriteRule .* - [F,L]
</IfModule>

# PHP open_basedir restriction (add to php.ini or .user.ini)
# open_basedir = /var/www/html:/tmp