CVE-2025-31680 is a Cross-Site Request Forgery (CSRF) vulnerability identified in the Drupal Matomo Analytics module affecting versions prior to 1.24.0. Matomo Analytics is a popular open-source web analytics platform integrated into Drupal to provide website traffic and user behavior insights. The vulnerability arises because the module does not adequately verify the authenticity of requests that trigger state-changing actions, allowing an attacker to craft malicious web requests that, when executed by an authenticated user, perform unauthorized actions on their behalf without their consent. The CVSS 3.1 base score of 6.8 reflects a medium severity level, with the vector indicating network attack vector (AV:N), high attack complexity (AC:H), no privileges required (PR:N), user interaction required (UI:R), unchanged scope (S:U), no confidentiality impact (C:N), but high impact on integrity (I:H) and availability (A:H). This means that while an attacker cannot directly steal data, they can manipulate or disrupt analytics data and potentially affect the availability of analytics services. Exploitation requires the victim to interact with a malicious link or webpage while authenticated to the vulnerable Drupal Matomo Analytics instance. No known exploits are currently reported in the wild, and no official patches have been published yet. However, the vulnerability poses a risk to the integrity and availability of analytics data, which can impact decision-making and monitoring capabilities for organizations relying on this module.

For European organizations, the impact of this CSRF vulnerability in Drupal Matomo Analytics can be significant, especially for entities that rely heavily on web analytics for business intelligence, marketing, and operational monitoring. Successful exploitation can lead to unauthorized manipulation of analytics data, causing inaccurate reporting and potentially misleading business decisions. Additionally, attackers could disrupt analytics availability, impairing real-time monitoring and incident detection. While the vulnerability does not directly compromise user data confidentiality, the integrity and availability impacts can indirectly affect compliance with data governance and regulatory requirements such as GDPR, where accurate data processing is critical. Organizations in sectors like e-commerce, media, government, and finance that use Drupal with Matomo Analytics are particularly at risk. The attack requires user interaction but no authentication privileges, meaning that any authenticated user visiting a malicious site could trigger the exploit, increasing the attack surface. Given the widespread use of Drupal in Europe and the popularity of Matomo Analytics as a privacy-focused alternative to other analytics platforms, the threat is relevant to many European organizations.

To mitigate this vulnerability, European organizations should: 1) Immediately audit their Drupal installations to identify the presence and version of the Matomo Analytics module. 2) Apply updates to Matomo Analytics as soon as version 1.24.0 or later becomes available, as this will contain the necessary CSRF protections. 3) In the interim, implement web application firewall (WAF) rules to detect and block suspicious CSRF patterns targeting the analytics endpoints. 4) Enforce strict Content Security Policy (CSP) headers to reduce the risk of malicious cross-origin requests. 5) Educate users about the risks of clicking on untrusted links while authenticated to sensitive web applications. 6) Review and harden session management and anti-CSRF tokens in custom Drupal modules or configurations to ensure comprehensive protection. 7) Monitor analytics data for anomalies that could indicate manipulation attempts. 8) Limit user permissions where possible to reduce the impact of compromised accounts. These steps go beyond generic advice by focusing on immediate detection, user awareness, and interim protective controls until patches are applied.