CVE-2025-13119 identifies a Cross-Site Request Forgery (CSRF) vulnerability in Fabian Ros Simple E-Banking System version 1.0. CSRF vulnerabilities occur when an attacker tricks an authenticated user into submitting a forged HTTP request, causing the user’s browser to perform unwanted actions on a web application where they are logged in. In this case, the vulnerability allows remote attackers to initiate banking operations without the user's consent or knowledge. The vulnerability does not require the attacker to have any privileges or authentication, but it does require the victim to interact with a malicious link or webpage (user interaction). The CVSS 4.0 vector indicates the attack is network-based (AV:N), requires low attack complexity (AC:L), no privileges (PR:N), no authentication (AT:N), but requires user interaction (UI:P). The impact primarily affects the integrity of banking transactions (VI:L) with no direct confidentiality or availability impact. The lack of patch links suggests no official fix is currently available, increasing the urgency for organizations to apply compensating controls. The exploit code has been published, which raises the likelihood of exploitation attempts. Given the sensitive nature of e-banking systems, even a medium severity vulnerability can have significant consequences if exploited.

For European organizations, this vulnerability poses a risk of unauthorized manipulation of banking transactions, potentially leading to financial losses, fraud, and erosion of customer trust. While the vulnerability does not directly expose confidential data, unauthorized transaction changes can disrupt financial operations and cause reputational damage. Banks and financial institutions using the affected Simple E-Banking System version 1.0 are particularly vulnerable. The attack vector requires user interaction, so phishing or social engineering campaigns could be used to exploit this flaw. The impact is more pronounced in countries with higher adoption of this software or where smaller banks and financial institutions rely on this system. Regulatory compliance frameworks in Europe, such as GDPR and PSD2, may impose additional obligations to address such vulnerabilities promptly. Failure to mitigate could result in regulatory penalties and loss of customer confidence.

1. Implement anti-CSRF tokens in all state-changing requests to ensure that requests originate from legitimate users. 2. Validate the HTTP Referer and Origin headers on the server side to confirm requests come from trusted sources. 3. Enforce SameSite cookie attributes to restrict cross-origin requests. 4. Educate users about the risks of clicking on suspicious links or visiting untrusted websites, as user interaction is required for exploitation. 5. Monitor transaction logs for unusual activities that may indicate exploitation attempts. 6. If possible, upgrade or patch the Simple E-Banking System once an official fix is released. 7. Consider deploying Web Application Firewalls (WAFs) with rules to detect and block CSRF attack patterns. 8. Conduct regular security assessments and penetration testing focused on CSRF and related web vulnerabilities. 9. Limit session lifetimes and enforce multi-factor authentication to reduce the window of opportunity for attackers. 10. Collaborate with vendors and security communities to stay informed about updates and emerging threats related to this vulnerability.