CVE-2025-7031 is a vulnerability identified in the Drupal Config Pages Viewer module, specifically versions prior to 1.0.4 (including version 0.0.0). The vulnerability is classified under CWE-306, which refers to Missing Authentication for a Critical Function. This means that certain critical functions within the Config Pages Viewer module do not enforce proper authentication checks, allowing unauthorized users to access sensitive configuration pages. The Config Pages Viewer is a Drupal module designed to display configuration information within the Drupal administrative interface. Due to the missing authentication controls, attackers can exploit this flaw remotely (as indicated by the CVSS vector AV:N - Attack Vector: Network) without any privileges (PR:N) or user interaction (UI:N). The vulnerability impacts confidentiality (C:L) but does not affect integrity or availability. The CVSS score of 5.3 (medium severity) reflects a moderate risk, primarily because the exploit does not require authentication or user interaction, but the impact is limited to information disclosure rather than system compromise or denial of service. No known exploits are currently reported in the wild, and no patches have been linked yet, indicating that the vulnerability is either newly disclosed or not yet widely exploited. The issue arises from incorrectly configured access control security levels, meaning that the module fails to restrict access to configuration data that should be protected. This can lead to unauthorized disclosure of potentially sensitive configuration details, which could aid attackers in further attacks or reconnaissance.

For European organizations using Drupal with the Config Pages Viewer module, this vulnerability poses a risk of unauthorized disclosure of configuration information. Such information can include site settings, module configurations, or other sensitive data that could facilitate further attacks such as privilege escalation, targeted phishing, or exploitation of other vulnerabilities. While the vulnerability does not directly allow modification or disruption of services, the leakage of configuration data can compromise the confidentiality of internal system details. This is particularly critical for organizations handling sensitive data or operating in regulated sectors such as finance, healthcare, or government. The ease of remote exploitation without authentication increases the risk, especially for publicly accessible Drupal sites. However, the medium severity and lack of known exploits suggest that immediate impact may be limited but should not be ignored. Organizations failing to address this could face increased risk of targeted attacks leveraging the disclosed information.

1. Immediate upgrade: Organizations should upgrade the Config Pages Viewer module to version 1.0.4 or later once available, as this version addresses the authentication issue. 2. Access control review: Until a patch is applied, restrict access to the Drupal administrative interface and configuration pages via network-level controls such as IP whitelisting, VPN access, or web application firewalls (WAFs) to limit exposure to trusted users only. 3. Module audit: Review all installed Drupal modules for similar access control weaknesses, especially those exposing configuration or administrative data. 4. Monitoring and logging: Enable detailed logging of access to configuration pages and monitor for unusual or unauthorized access attempts. 5. Harden Drupal security: Implement Drupal security best practices, including strong authentication mechanisms, role-based access controls, and regular security updates. 6. Incident response preparation: Prepare to respond to potential information disclosure incidents by having processes to assess and remediate any exploitation attempts quickly.