CVE-2025-62113 identifies a Cross-Site Request Forgery (CSRF) vulnerability in the emendo_seb Co-marquage service-public.fr product, affecting versions up to 0.5.77. CSRF vulnerabilities occur when a web application does not adequately verify that requests originate from legitimate users, allowing attackers to craft malicious web requests that execute unwanted actions on behalf of authenticated users. In this case, the vulnerability allows an attacker to induce users of the Co-marquage service-public.fr platform to unknowingly perform actions by exploiting the lack of proper anti-CSRF protections. The CVSS 3.1 vector indicates that the attack can be performed remotely over the network (AV:N), requires no privileges (PR:N), but does require user interaction (UI:R), and impacts integrity (I:L) without affecting confidentiality or availability. The vulnerability is categorized under CWE-352, which is a common web security weakness related to CSRF. No patches or fixes have been released at the time of publication, and no active exploitation has been reported. The affected product is used primarily in the French public sector for co-branding or co-marking services, which suggests a targeted impact on government or public administration websites. The vulnerability could allow attackers to perform unauthorized state-changing operations, such as modifying user settings or submitting forms, potentially undermining trust and operational integrity of public services.

For European organizations, particularly those in France where the Co-marquage service-public.fr is deployed, this vulnerability poses a risk to the integrity of web-based administrative processes. Attackers could exploit this flaw to perform unauthorized actions on behalf of legitimate users, potentially leading to unauthorized data modifications, fraudulent submissions, or disruption of public service workflows. While confidentiality and availability are not directly impacted, the integrity breach could erode user trust and cause administrative complications. Other European countries using similar or related services from emendo_seb might face secondary risks if they deploy the affected product. The impact is heightened in public sector environments where the accuracy and authenticity of user actions are critical. Additionally, the vulnerability could be leveraged in targeted phishing campaigns to trick users into executing malicious requests. The absence of known exploits reduces immediate risk, but the medium severity rating indicates that organizations should not delay mitigation efforts.

To mitigate CVE-2025-62113, organizations should implement robust anti-CSRF protections such as synchronizer tokens or double-submit cookies to ensure that all state-changing requests are validated for authenticity. Web applications should verify the HTTP Referer or Origin headers to confirm requests originate from trusted sources. User sessions should be protected with secure cookie attributes (HttpOnly, Secure, SameSite) to reduce attack surface. Educating users to avoid clicking on suspicious links or visiting untrusted websites while authenticated can reduce the risk of exploitation. Network-level controls such as Web Application Firewalls (WAFs) can be configured to detect and block CSRF attack patterns. Organizations should monitor logs for unusual or unauthorized state-changing requests. Finally, staying informed about vendor updates and applying patches promptly once released is essential. If possible, conducting security assessments or penetration testing focused on CSRF vulnerabilities can help identify and remediate weaknesses proactively.