CVE-2025-40657 is a critical SQL injection vulnerability identified in the DM Corporative CMS developed by Dmacroweb. The vulnerability resides in the 'codform' parameter within the '/modules/forms/collectform.asp' endpoint. SQL injection (CWE-89) occurs when untrusted input is improperly sanitized and directly incorporated into SQL queries, allowing attackers to manipulate the database commands executed by the application. In this case, the flaw enables an unauthenticated remote attacker to perform unauthorized actions on the backend database, including retrieving, creating, updating, and deleting data. The vulnerability has a CVSS 4.0 base score of 9.3, indicating a critical severity level. It requires no authentication or user interaction and can be exploited over the network with low attack complexity. The impact on confidentiality, integrity, and availability is high, as attackers can fully compromise the database, potentially leading to data breaches, data loss, or service disruption. There are no known exploits in the wild yet, and no patches have been published at the time of this report. The vulnerability was reserved in April 2025 and published in June 2025. Given the nature of the CMS as a content management system, exploitation could affect websites and web applications relying on DM Corporative CMS, potentially exposing sensitive organizational data and disrupting business operations.

For European organizations using DM Corporative CMS, this vulnerability poses a significant risk. Exploitation could lead to unauthorized data access, including sensitive customer or business information, violating data protection regulations such as GDPR. The ability to modify or delete database content threatens data integrity and availability, potentially causing operational downtime and reputational damage. Organizations in sectors with high regulatory scrutiny or those handling critical infrastructure data are particularly vulnerable. The lack of authentication requirement means attackers can exploit this remotely without prior access, increasing the attack surface. Additionally, the absence of patches means organizations must rely on mitigations until official fixes are released, prolonging exposure. This vulnerability could also be leveraged as a foothold for further attacks within corporate networks, escalating the overall threat landscape for European entities.

Given the absence of an official patch, European organizations should implement immediate compensating controls. These include deploying web application firewalls (WAFs) with custom rules to detect and block SQL injection attempts targeting the 'codform' parameter and the affected endpoint. Input validation and sanitization should be enforced at the application level if source code access is available, employing parameterized queries or prepared statements to prevent injection. Network segmentation can limit the exposure of the CMS server to only trusted internal or partner IPs. Continuous monitoring of web server logs and database activity for anomalous queries or access patterns is critical to detect exploitation attempts early. Organizations should also consider temporarily disabling or restricting access to the vulnerable module if feasible. Finally, maintaining an incident response plan tailored to web application attacks will help mitigate impact in case of successful exploitation. Once patches become available, prompt application is essential.