CVE-2025-59555 is a vulnerability classified as Remote File Inclusion (RFI) in the ThemeMove Medizin WordPress theme, affecting versions before 1.9.7. The root cause is improper control over the filename parameter used in PHP include or require statements, which allows an attacker to manipulate the input to include arbitrary files. This can be exploited by submitting crafted requests that cause the server to load malicious remote or local files, leading to arbitrary code execution. The vulnerability is particularly dangerous because it does not require authentication, enabling remote attackers to gain control over the affected web server. The flaw can be leveraged to execute malicious PHP code, steal sensitive data, modify website content, or pivot to further internal network attacks. Although no public exploits have been reported yet, the nature of RFI vulnerabilities historically leads to rapid exploitation once disclosed. The affected product, Medizin, is a WordPress theme targeted primarily at medical and healthcare websites, which often handle sensitive personal health information. The vulnerability was reserved in September 2025 and published in October 2025, but no official patch links are currently provided, indicating that users must monitor vendor updates closely. The lack of a CVSS score requires an independent severity assessment based on impact and exploitability factors.

For European organizations, the impact of CVE-2025-59555 can be severe, especially for healthcare providers, clinics, and medical service websites using the Medizin theme. Exploitation could lead to unauthorized access to patient data, violation of GDPR regulations, and significant reputational damage. Attackers could execute arbitrary code on web servers, potentially leading to full system compromise, data exfiltration, or ransomware deployment. The availability of medical websites could be disrupted, affecting critical healthcare services. Additionally, compromised servers could be used as a foothold for lateral movement within organizational networks. The breach of sensitive health data could result in legal penalties and loss of trust from patients and partners. The threat is heightened by the fact that no authentication is required to exploit the vulnerability, increasing the attack surface. Organizations relying on this theme must consider the potential for both direct and collateral damage from exploitation.

1. Immediately update the Medizin theme to version 1.9.7 or later once the patch is available from ThemeMove. 2. Until a patch is applied, disable the allow_url_include directive in the PHP configuration to prevent remote file inclusion. 3. Implement strict input validation and sanitization on all parameters that influence file inclusion paths to prevent manipulation. 4. Use web application firewalls (WAFs) with rules designed to detect and block suspicious include/require requests. 5. Restrict PHP include paths to trusted directories only, using open_basedir or similar PHP configuration settings. 6. Monitor web server and application logs for unusual file inclusion attempts or unexpected HTTP requests. 7. Conduct regular security audits and vulnerability scans focusing on WordPress themes and plugins. 8. Educate web administrators about the risks of using outdated themes and the importance of timely patching. 9. Consider isolating web servers hosting sensitive medical data to limit lateral movement in case of compromise. 10. Backup website data regularly and verify the integrity of backups to enable quick recovery if needed.