CVE-2025-59019 is a medium-severity vulnerability affecting TYPO3 CMS versions 11.0.0 through 11.5.47, 12.0.0 through 12.4.36, and 13.0.0 through 13.4.17. The issue arises from missing authorization checks in the CSV download feature within the backend interface. Specifically, backend users with limited privileges can exploit this flaw to download CSV exports of arbitrary database tables that reside within their assigned web mounts, even if they do not have explicit access rights to those tables. This constitutes an exposure of sensitive information (CWE-200) to unauthorized actors. The vulnerability requires only low privileges (backend user access) and no user interaction beyond accessing the CSV download functionality. The CVSS v4.0 score is 5.3 (medium), reflecting network attack vector, low attack complexity, no authentication beyond low privileges, and limited confidentiality impact. The flaw does not affect integrity or availability but compromises confidentiality by allowing unauthorized data disclosure. No known exploits are currently reported in the wild, and no patches are linked yet, indicating that organizations should prioritize monitoring and mitigation. TYPO3 CMS is a widely used open-source content management system, especially popular in European public sector and enterprise environments, making this vulnerability relevant for organizations relying on TYPO3 for web content management.

For European organizations, the impact centers on unauthorized disclosure of potentially sensitive or confidential data stored in TYPO3 CMS databases. Since the vulnerability allows backend users with limited privileges to access data beyond their authorization, it could lead to leakage of personal data, internal business information, or other protected content. This is particularly concerning for organizations subject to GDPR, as unauthorized data exposure can result in regulatory penalties and reputational damage. Public sector entities, educational institutions, and enterprises using TYPO3 CMS in Europe may face increased risk if internal user accounts are compromised or misused. Although the vulnerability does not allow data modification or service disruption, the confidentiality breach alone can have serious consequences, including data privacy violations and loss of trust. The absence of known exploits reduces immediate risk, but the ease of exploitation and network accessibility mean attackers could develop exploits rapidly once details become public.

Organizations should immediately audit backend user privileges to ensure that only trusted personnel have access to TYPO3 CMS backend features, especially the CSV download functionality. Implement strict role-based access controls (RBAC) to limit backend user permissions to the minimum necessary. Monitor and log all CSV export activities to detect unusual or unauthorized data access patterns. Until official patches are released, consider disabling or restricting the CSV download feature for users with limited privileges. Regularly update TYPO3 CMS to the latest patched versions once available. Additionally, conduct internal security awareness training to prevent misuse of backend accounts. Network segmentation and multi-factor authentication (MFA) for backend access can further reduce risk by limiting attacker lateral movement and account compromise. Finally, review database table permissions and web mount configurations to minimize exposure of sensitive data within the CMS environment.