CVE-2025-57992 is a Cross-Site Request Forgery (CSRF) vulnerability identified in InterServer's Mail Baby SMTP product, affecting versions up to 2.8. CSRF vulnerabilities occur when an attacker tricks an authenticated user into submitting a forged HTTP request to a web application, causing the application to perform unwanted actions on behalf of the user without their consent. In this case, the vulnerability allows an attacker to induce a user to execute unintended commands or state-changing requests on the Mail Baby SMTP interface. The CVSS 3.1 base score of 4.3 indicates a medium severity level, with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N showing that the attack can be performed remotely over the network without privileges, requires low attack complexity, no privileges, but does require user interaction (UI:R). The impact is limited to integrity (I:L) with no confidentiality or availability impact. No known exploits are currently in the wild, and no patches have been linked yet. The vulnerability is categorized under CWE-352, which is a common web security weakness related to insufficient anti-CSRF protections. Since Mail Baby SMTP is an SMTP service with a web interface component, this vulnerability likely targets the web management console or API endpoints that control mail server settings or operations. Exploitation could allow attackers to manipulate mail server configurations or send unauthorized commands, potentially leading to mail relay abuse or disruption of mail services indirectly through configuration changes.

For European organizations using InterServer's Mail Baby SMTP, this vulnerability poses a moderate risk primarily to the integrity of mail server configurations. Successful exploitation could allow attackers to alter SMTP settings or send unauthorized commands by leveraging authenticated users' sessions, potentially enabling spam relay, phishing campaigns, or disruption of email services. While confidentiality and availability impacts are not directly indicated, the integrity compromise could indirectly affect email reliability and trustworthiness, which are critical for business communications and regulatory compliance (e.g., GDPR requirements for secure communications). Organizations relying on Mail Baby SMTP for internal or external email delivery could face reputational damage and operational challenges if attackers manipulate mail flows or configurations. The requirement for user interaction reduces the risk somewhat but does not eliminate it, especially in environments where users may be targeted with phishing or social engineering to trigger the CSRF attack.

To mitigate this vulnerability, European organizations should implement the following specific measures: 1) Apply any available patches or updates from InterServer promptly once released. 2) If patches are not yet available, restrict access to the Mail Baby SMTP web interface to trusted networks or VPNs to reduce exposure. 3) Employ web application firewalls (WAFs) with rules designed to detect and block CSRF attack patterns targeting the SMTP management interface. 4) Enforce strict session management and use anti-CSRF tokens in all state-changing requests within the Mail Baby SMTP web interface to prevent unauthorized actions. 5) Educate users about phishing and social engineering risks that could lead to inadvertent triggering of CSRF attacks. 6) Monitor mail server logs for unusual configuration changes or unauthorized mail sending patterns that could indicate exploitation attempts. 7) Consider isolating the SMTP management interface from general user access or integrating multi-factor authentication to reduce the risk of session hijacking and CSRF exploitation.