CVE-2025-62029 is a vulnerability classified as improper control of filename for include/require statements in the PHP program themesion Grevo, versions up to 2.4. This type of vulnerability is commonly known as Remote File Inclusion (RFI). In PHP applications, include and require statements are used to incorporate external files into the executing script. If the filename parameter is not properly sanitized or validated, an attacker can manipulate it to include a remote file hosted on an attacker-controlled server. This can lead to arbitrary code execution, allowing the attacker to run malicious PHP code on the target server. The vulnerability affects the Grevo product, a PHP-based application or theme developed by themesion. The lack of proper control over the filename parameter means that an attacker can supply a URL or path to a malicious script, which the server will then include and execute. This can compromise the confidentiality, integrity, and availability of the affected system. The vulnerability was published on October 22, 2025, and no CVSS score has been assigned yet. There are no known exploits in the wild at the time of publication, but the nature of RFI vulnerabilities makes them highly attractive targets for attackers. The absence of patches or mitigation links suggests that a fix may not yet be publicly available, increasing the urgency for organizations to implement interim protective measures. Since PHP is widely used in web applications, and Grevo is a PHP-based product, any web server running vulnerable versions is at risk. Attackers do not require authentication or user interaction to exploit this vulnerability, making it easier to weaponize in automated attacks. The vulnerability can lead to full system compromise, data theft, defacement, or use of the server as a pivot point for further attacks.

For European organizations, the impact of CVE-2025-62029 can be severe. Successful exploitation allows attackers to execute arbitrary code remotely, potentially leading to full system compromise. This can result in unauthorized access to sensitive data, disruption of web services, defacement of websites, and use of compromised servers for launching further attacks such as lateral movement or hosting malicious content. Organizations relying on Grevo for their web presence or internal applications may face reputational damage, regulatory penalties under GDPR for data breaches, and operational downtime. The vulnerability's ease of exploitation without authentication or user interaction increases the risk of widespread automated attacks. Additionally, compromised servers can be enlisted in botnets or used to distribute malware, amplifying the threat landscape. The lack of an official patch at the time of disclosure means organizations must act swiftly to implement mitigations to prevent exploitation. The impact is particularly critical for sectors with high-value data or critical infrastructure, such as finance, healthcare, and government entities in Europe.

1. Immediate identification of all Grevo installations within the organization’s environment is critical. Use asset management and vulnerability scanning tools to locate affected versions. 2. Until an official patch is released, implement strict input validation and sanitization on any user-controllable parameters that influence include or require statements. 3. Employ web application firewalls (WAFs) with rules designed to detect and block attempts to exploit RFI vulnerabilities, such as suspicious URL patterns or remote file inclusion attempts. 4. Restrict outbound HTTP/HTTPS traffic from web servers to only trusted destinations to prevent the server from fetching malicious remote files. 5. Disable allow_url_include and allow_url_fopen directives in PHP configuration if not required, as these settings facilitate remote file inclusion. 6. Monitor web server logs for unusual requests or errors that may indicate exploitation attempts. 7. Prepare to apply official patches or updates from themesion as soon as they become available. 8. Conduct security awareness training for developers and administrators on secure coding practices related to file inclusion and input validation. 9. Consider isolating vulnerable web applications in segmented network zones to limit potential lateral movement in case of compromise. 10. Regularly back up web server data and configurations to enable rapid recovery if exploitation occurs.