CVE-2025-12855 identifies a SQL injection vulnerability in the Responsive Hotel Site version 1.0 developed by code-projects. The vulnerability resides in the /admin/newsletterdel.php script, where the 'eid' parameter is improperly sanitized, allowing malicious input to alter SQL queries executed by the backend database. This flaw can be exploited remotely, but the CVSS vector indicates that high privileges (PR:H) are required, meaning an attacker must already have elevated access to the system to leverage the injection. The vulnerability impacts confidentiality, integrity, and availability at a low level, as it could allow unauthorized reading or modification of data and potentially disrupt services. No user interaction is needed, and the attack complexity is low once privileges are obtained. Although no patches have been linked yet, the public release of exploit code increases the risk of exploitation. The vulnerability does not affect system components beyond the specified file and parameter, limiting its scope. The presence of this flaw in a hospitality management system could expose sensitive customer data or administrative functions to attackers, emphasizing the need for prompt remediation.

For European organizations, particularly those in the hospitality and tourism sectors using the Responsive Hotel Site software, this vulnerability poses risks of unauthorized data disclosure, data tampering, and potential service disruption. Attackers with high-level access could exploit the SQL injection to extract sensitive customer information such as personal details and booking data, undermining privacy compliance obligations like GDPR. Integrity of the database could be compromised, affecting business operations and trust. Although the vulnerability requires elevated privileges, insider threats or lateral movement by attackers could facilitate exploitation. The public availability of exploit code increases the likelihood of attacks, potentially leading to reputational damage and regulatory penalties. Smaller hotels or chains relying on this software without robust security controls are particularly vulnerable. The impact is somewhat contained by the need for high privileges, but the risk remains significant for affected entities.

Organizations should immediately audit their use of the Responsive Hotel Site version 1.0 and restrict access to the /admin/newsletterdel.php endpoint to trusted administrators only, ideally through network segmentation and IP whitelisting. Implement strict input validation and parameterized queries or prepared statements to prevent SQL injection. Monitor logs for unusual database queries or access patterns indicative of exploitation attempts. Since no official patch is currently available, consider applying virtual patching via web application firewalls (WAFs) configured to detect and block SQL injection payloads targeting the 'eid' parameter. Conduct thorough privilege reviews to ensure that only necessary users have high-level access, reducing the attack surface. Plan for an upgrade or migration to a patched or alternative solution once available. Regularly back up databases and test restoration procedures to mitigate potential data loss. Engage in threat intelligence sharing within the hospitality sector to stay informed about emerging exploits.