CVE-2025-67938: 
WordPress vulnerability analysis and mitigation

CVE-2025-67938 is a Local File Inclusion (LFI) vulnerability in the Mikado-Themes Biagiotti WordPress theme, classified under CWE-98 (Improper Control of Filename for Include/Require Statement in PHP Program). It affects all Biagiotti theme versions prior to 3.5.2 and was reported by researcher Tran Nguyen Bao Khanh (VCI - VNPT Cyber Immunity) on October 24, 2025, with public disclosure on January 15–22, 2026. The vulnerability carries a CVSS v3.1 base score of 8.1 (High), as assessed by CISA-ADP (Patchstack, NVD).

The vulnerability stems from improper validation and sanitization of user-supplied input used in PHP include/require statements within the Biagiotti WordPress theme (CWE-98). An unauthenticated remote attacker can manipulate filename parameters passed to these statements to include arbitrary local files on the server, potentially exposing sensitive content or executing malicious PHP code already present on the filesystem. Exploitation requires high attack complexity (e.g., specific preconditions such as file upload capability or knowledge of file paths), but no authentication or user interaction is needed (Patchstack, NVD).

Successful exploitation allows an attacker to read arbitrary local files on the web server, potentially exposing sensitive data such as database credentials, WordPress configuration files (e.g., wp-config.php), and other server-side files. If combined with a file upload vector, an attacker could include and execute malicious PHP code, leading to full server compromise. The vulnerability has high confidentiality, integrity, and availability impacts, and could enable complete database takeover depending on server configuration (Patchstack).

There is no public proof-of-concept exploit code and no evidence of in-the-wild exploitation at this time (Patchstack). The EPSS score is approximately 0.053%, indicating a low current probability of exploitation. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. Patchstack has classified it as high priority, noting that vulnerabilities of this class are commonly used in mass-exploit campaigns targeting WordPress sites at scale.

1. Reconnaissance: Identify WordPress sites using the Biagiotti theme (versions < 3.5.2) via passive scanning tools (e.g., WPScan, Shodan) or by inspecting theme metadata in page source.
2. Identify vulnerable parameter: Locate the theme's PHP include/require statement that accepts user-controlled input for the filename, typically via a GET or POST parameter in a theme template or AJAX handler.
3. Craft malicious request: Send an HTTP request with a manipulated filename parameter pointing to a sensitive local file (e.g., ../../../../wp-config.php) to trigger the LFI.
4. Extract sensitive data: Review the server response for leaked file contents, such as database credentials from wp-config.php.
5. Escalate (if applicable): If a file upload mechanism is available, upload a PHP web shell, then use the LFI to include and execute it for remote code execution (Patchstack).

• Network: Unusual HTTP GET/POST requests to theme-related endpoints containing path traversal sequences (e.g., ../, ..%2F, %2e%2e%2f) in filename or template parameters.
• Logs: WordPress or web server access logs showing requests with encoded path traversal patterns targeting theme PHP files; repeated 200 responses to requests with suspicious filename parameters.
• File System: Unexpected PHP files uploaded to writable directories (e.g., /wp-content/uploads/) that could be used as LFI payloads; access timestamps on sensitive files like wp-config.php updated unexpectedly.
• Process: Unusual PHP process activity reading files outside the WordPress root directory.

The primary remediation is to update the Biagiotti WordPress theme to version 3.5.2 or later, which contains the fix for this vulnerability (Patchstack). For sites unable to update immediately, Patchstack has issued a virtual patching/mitigation rule to block exploitation attempts. Additional interim measures include implementing Web Application Firewall (WAF) rules to detect and block path traversal patterns, restricting file system permissions to limit readable files, and disabling unnecessary file upload functionality to reduce LFI escalation risk.

Wordfence included this vulnerability in their weekly WordPress vulnerability report for the period of January 12–18, 2026, highlighting it as part of broader WordPress theme security coverage (Wordfence Blog). Patchstack, which discovered and disclosed the vulnerability, classified it as high priority and noted its potential for use in mass-exploit campaigns targeting WordPress sites.