CVE-2025-62066 is a Remote File Inclusion (RFI) vulnerability found in the Revolution product by fuelthemes, affecting all versions prior to 2.5.8. The vulnerability stems from improper control over the filename parameter used in PHP include or require statements. This flaw allows an attacker with low privileges (PR:L) and requiring user interaction (UI:R) to remotely include and execute arbitrary PHP code hosted on a remote server. The CVSS v3.1 score of 7.4 reflects a high severity, with attack vector being adjacent network (AV:A), low attack complexity (AC:L), and impacts on confidentiality, integrity, and availability all rated high (C:H/I:H/A:H). The vulnerability can lead to full system compromise, including data theft, defacement, or denial of service. No known exploits are currently reported in the wild, but the vulnerability is publicly disclosed and patched in version 2.5.8. The issue is particularly critical for web servers running Revolution themes in PHP environments, as remote file inclusion can bypass many security controls if input validation is insufficient. The vulnerability was reserved in early October 2025 and published in November 2025, indicating recent discovery and disclosure. Due to the nature of PHP applications and their widespread use in web hosting, this vulnerability poses a significant risk to affected installations.

For European organizations, this vulnerability poses a substantial risk to web applications using the Revolution theme by fuelthemes, especially those running PHP-based CMS or e-commerce platforms. Exploitation could lead to unauthorized remote code execution, resulting in data breaches, website defacement, or service outages. Confidential customer data and intellectual property could be exposed or altered, undermining trust and potentially violating GDPR regulations. The high impact on availability could disrupt business operations, causing financial loss and reputational damage. Since the attack requires low privileges but user interaction, phishing or social engineering could be used to trigger exploitation. Organizations relying on Revolution themes for customer-facing websites or internal portals are particularly vulnerable. The lack of known exploits in the wild provides a window for proactive patching and mitigation before widespread attacks occur. Failure to address this vulnerability promptly could lead to targeted attacks, especially in sectors with high-value data such as finance, healthcare, and government services.

1. Immediately upgrade all installations of the Revolution theme to version 2.5.8 or later, where the vulnerability is patched. 2. Implement strict input validation and sanitization on all parameters that influence file inclusion paths to prevent injection of remote URLs or malicious filenames. 3. Configure PHP settings to disable allow_url_include and allow_url_fopen directives to prevent remote file inclusion via URL. 4. Employ web application firewalls (WAF) with rules designed to detect and block suspicious include/require requests or attempts to load remote files. 5. Conduct regular security audits and code reviews focusing on file inclusion mechanisms within custom PHP code or third-party themes/plugins. 6. Educate users and administrators about phishing risks and the importance of cautious interaction with untrusted content to reduce the chance of triggering user-interaction-based exploits. 7. Monitor logs for unusual file inclusion attempts or errors related to include/require statements. 8. Isolate web servers running vulnerable themes in segmented network zones to limit lateral movement in case of compromise.