CVE-2025-64497 is a medium-severity authorization bypass vulnerability identified in Enalean's Tuleap software, an open-source platform widely used for software development management and team collaboration. The vulnerability arises from CWE-639, which involves authorization bypass through a user-controlled key. Specifically, in affected versions of Tuleap Community Edition below 17.0.99.1762431347 and Enterprise Editions below 17.0-2, 16.13-7, and 16.12-10, an attacker with limited privileges can manipulate user-controlled keys to bypass authorization checks and gain unauthorized access to file release system information belonging to projects they do not have permission to access. This flaw compromises the confidentiality of sensitive project data without affecting data integrity or system availability. The vulnerability can be exploited remotely over the network (AV:N), requires low attack complexity (AC:L), and only requires privileges at the user level (PR:L), with no user interaction needed (UI:N). The scope remains unchanged (S:U), meaning the impact is confined to the vulnerable component. Although no known exploits have been reported in the wild, the nature of the vulnerability makes it a significant risk for organizations relying on Tuleap for managing proprietary or sensitive software projects. The issue has been addressed in Tuleap Community Edition version 17.0.99.1762431347 and Enterprise Editions 17.0-2, 16.13-7, and 16.12-10, where proper authorization checks have been implemented to prevent unauthorized access via user-controlled keys.

For European organizations, especially those involved in software development, IT services, and collaborative projects, this vulnerability poses a risk of unauthorized disclosure of sensitive project files and release information. Such data leakage can lead to intellectual property theft, exposure of confidential development plans, and potential competitive disadvantage. Public sector entities and critical infrastructure operators using Tuleap may face increased risks of espionage or data leaks. Although the vulnerability does not allow modification or destruction of data, the confidentiality breach alone can have serious reputational and operational consequences. The medium severity rating reflects the balance between the ease of exploitation and the limited scope of impact. However, organizations with strict compliance requirements around data confidentiality (e.g., GDPR) must consider the potential regulatory implications of unauthorized data access. The absence of known exploits in the wild suggests a window for proactive mitigation before active attacks emerge.

Organizations should promptly upgrade affected Tuleap installations to the fixed versions: Community Edition 17.0.99.1762431347 or Enterprise Editions 17.0-2, 16.13-7, and 16.12-10. Prior to patching, administrators should audit project access controls and review user permissions to ensure the principle of least privilege is enforced. Implement network segmentation and restrict Tuleap access to trusted internal networks or VPNs to reduce exposure. Enable detailed logging and monitoring of access to file release systems to detect anomalous access patterns indicative of exploitation attempts. Regularly review and update authentication mechanisms and consider multi-factor authentication for user accounts with elevated privileges. Engage in security awareness training for developers and project managers to recognize and report suspicious activities. Finally, maintain an incident response plan tailored to potential data leakage scenarios involving software development assets.