CVE-2025-49359: 
WordPress vulnerability analysis and mitigation

CVE-2025-49359 is a PHP Local File Inclusion (LFI) vulnerability in the AncoraThemes ShieldGroup WordPress theme. It stems from improper control of filename parameters used in PHP include/require statements (CWE-98), allowing unauthenticated remote attackers to include arbitrary local files. All versions of the ShieldGroup theme up to and including 2.13 are affected. The vulnerability was published on December 18, 2025, and carries a CVSS v3.1 base score of 8.1 (High) (Feedly, Patchstack).

The root cause is classified under CWE-98 (Improper Control of Filename for Include/Require Statement in PHP Program), where user-supplied input is passed unsanitized to a PHP include() or require() function within the ShieldGroup theme. This allows an attacker to manipulate the filename parameter to traverse the server's directory structure and include sensitive local files. The attack vector is network-based, requires no authentication or user interaction, but has high attack complexity, suggesting some precondition or non-default configuration may be required to exploit it successfully (Feedly).

Successful exploitation can result in high impact to confidentiality, integrity, and availability of the affected WordPress installation. An attacker could read sensitive local files (e.g., WordPress wp-config.php containing database credentials), potentially escalate to remote code execution by including files with attacker-controlled content (e.g., uploaded images containing PHP code), and fully compromise the hosting environment. This could enable lateral movement within shared hosting environments or lead to complete site takeover (Feedly).

No public proof-of-concept exploit code or evidence of active in-the-wild exploitation has been reported as of the time of publication. The EPSS score is approximately 0.053%, indicating a low current probability of exploitation in the wild. The vulnerability has not been added to the CISA Known Exploited Vulnerabilities (KEV) catalog. The high attack complexity rating suggests exploitation may require specific conditions to be met (Feedly).

1. Reconnaissance: Identify WordPress sites using the ShieldGroup theme (version ≤ 2.13) via passive fingerprinting tools such as WPScan, Shodan, or by inspecting HTTP response headers and page source for theme references.
2. Identify vulnerable parameter: Locate the theme's PHP include/require call that accepts user-controlled input, typically via a GET or POST parameter in a theme template or AJAX handler.
3. Craft LFI payload: Construct a request with a directory traversal payload targeting sensitive files, e.g., ?parameter=../../../../wp-config.php or ?parameter=../../../../etc/passwd.
4. Extract sensitive data: Parse the server response to extract credentials or other sensitive information from included files such as wp-config.php (database host, username, password).
5. Escalate to RCE (optional): If file upload functionality is available, upload a file containing PHP code (e.g., disguised as an image), then use the LFI to include it and achieve remote code execution (Feedly).

• Network: HTTP requests containing directory traversal sequences (../, ..%2F, ....//) in query parameters targeting WordPress theme endpoints; unusual GET/POST requests to theme-related PHP files with unexpected filename parameters.
• Logs: WordPress or web server access logs showing requests with path traversal patterns (e.g., ../../../../wp-config.php) or encoded variants; repeated 200 responses to requests with suspicious filename parameters.
• File System: Unexpected access timestamps on sensitive files such as wp-config.php, /etc/passwd, or other system files; presence of web shells in the uploads directory.
• Process: Unusual PHP processes spawning child processes or making outbound network connections from the web server process.

Users should update the ShieldGroup WordPress theme to a version beyond 2.13 if a patched release is available from AncoraThemes. If no patch is yet available, consider temporarily deactivating the theme and switching to an alternative until a fix is released. As a general hardening measure, ensure open_basedir PHP restrictions are configured to limit file inclusion scope, and restrict write access to the WordPress uploads directory to prevent LFI-to-RCE escalation. Monitor the Patchstack database and AncoraThemes release notes for patch availability (Patchstack).