CVE-2025-67515 is a critical vulnerability classified as Remote File Inclusion (RFI) in the Mikado-Themes Wilmër PHP program, affecting versions prior to 3.5. The root cause is improper control over the filename parameter used in PHP include or require statements, which allows an attacker to specify arbitrary files to be included and executed by the server. This flaw enables unauthenticated remote attackers to execute arbitrary PHP code by supplying a malicious file path, potentially hosted on a remote server. The vulnerability does not require any privileges or user interaction, making it highly exploitable over the network. Successful exploitation can lead to full compromise of the affected web server, including data theft, defacement, malware deployment, or pivoting to internal networks. The CVSS v3.1 score of 9.8 reflects the critical nature of this vulnerability, with high impact on confidentiality, integrity, and availability. Although no public exploits have been reported yet, the vulnerability’s characteristics make it a prime target for attackers. The vulnerability affects Wilmër themes used in PHP-based websites, which are common in content management systems and e-commerce platforms. The lack of vendor patches at the time of publication increases the urgency for organizations to implement mitigations. The vulnerability was published on December 9, 2025, and is tracked under CVE-2025-67515.

For European organizations, the impact of CVE-2025-67515 can be severe. Many European businesses rely on PHP-based content management systems and e-commerce platforms that may use Mikado-Themes Wilmër. Exploitation could lead to unauthorized access to sensitive customer data, intellectual property theft, and disruption of online services, damaging reputation and causing financial losses. Public-facing websites and portals are particularly vulnerable, potentially leading to defacement or malware distribution that affects end users. Critical sectors such as finance, healthcare, and government could face regulatory penalties under GDPR if personal data is compromised. Additionally, attackers could leverage compromised servers as footholds for lateral movement within corporate networks, increasing the risk of broader cyberattacks. The high severity and ease of exploitation underscore the need for rapid response to mitigate potential damages.

To mitigate CVE-2025-67515, organizations should immediately audit all instances of Mikado-Themes Wilmër in their environments and identify affected versions prior to 3.5. Until official patches are released, implement strict input validation and sanitization on all parameters controlling file inclusion to prevent injection of arbitrary paths. Employ allowlisting to restrict include/require statements to trusted directories only. Configure PHP settings such as disabling allow_url_include and enabling open_basedir restrictions to limit file inclusion scope. Deploy Web Application Firewalls (WAFs) with rules to detect and block suspicious file inclusion attempts, including those containing remote URLs or directory traversal sequences. Monitor web server logs and network traffic for anomalous requests indicative of exploitation attempts. Plan for rapid patch deployment once vendor updates become available. Additionally, conduct security awareness training for developers to avoid insecure coding practices related to file inclusion.