CVE-2025-58935 is a Remote File Inclusion vulnerability found in the axiomthemes Lunna WordPress theme versions up to 1.15. The vulnerability stems from improper validation and control of filenames passed to PHP include or require statements, which are used to dynamically load code files. An attacker can exploit this flaw by manipulating the filename parameter to include a remote malicious PHP file hosted on an attacker-controlled server. This leads to arbitrary code execution within the context of the web server, potentially allowing the attacker to execute commands, steal sensitive data, modify website content, or pivot further into the network. The vulnerability is classified as a PHP Remote File Inclusion (RFI) issue, which is particularly dangerous because it does not require local access or authentication. Although no public exploits or patches are currently available, the vulnerability has been officially published and reserved under CVE-2025-58935. The affected product, Lunna, is a WordPress theme developed by axiomthemes, commonly used for business and portfolio websites. The lack of a CVSS score indicates that the vulnerability is newly disclosed and requires immediate attention from administrators and developers to prevent exploitation.

For European organizations, the impact of this vulnerability can be severe. Organizations using the Lunna theme on WordPress sites may face unauthorized remote code execution, leading to website defacement, data breaches, or complete server takeover. This can disrupt business operations, damage reputation, and result in regulatory penalties under GDPR if personal data is compromised. E-commerce platforms and service providers relying on WordPress themes are particularly vulnerable, as attackers could inject malicious scripts to steal customer data or deploy ransomware. The vulnerability also poses risks to supply chain security if exploited to distribute malware to visitors or connected systems. Given the widespread use of WordPress across Europe, the potential attack surface is significant, especially in countries with large digital economies and high WordPress adoption rates.

Immediate mitigation steps include disabling or removing the Lunna theme until a patch is available. Administrators should audit all include/require statements in the theme's PHP code to ensure proper input validation and sanitization, restricting file inclusion to trusted local files only. Employing Web Application Firewalls (WAFs) with rules to detect and block suspicious file inclusion attempts can provide interim protection. Monitoring web server logs for unusual requests or errors related to file inclusion parameters is critical for early detection. Organizations should also ensure that their WordPress installations and all themes/plugins are kept up to date and subscribe to security advisories from axiomthemes and WordPress security communities. Implementing least privilege principles on the web server and isolating web applications can limit the impact of a successful exploit. Finally, preparing an incident response plan specific to web application compromises will help minimize damage if exploitation occurs.