CVE-2025-53902 is a medium-severity vulnerability classified under CWE-863 (Incorrect Authorization) affecting Enalean's Tuleap software, an open-source suite designed to facilitate software development management and collaboration. The vulnerability exists in versions prior to 16.9.99.1752585665 of the Tuleap Community Edition and versions prior to 16.8-6 and 16.9-5 of the Tuleap Enterprise Edition. It allows users with limited privileges (requiring at least some level of authentication) to potentially access confidential information contained within artifacts they are not authorized to view. The flaw stems from improper authorization checks, which fail to adequately restrict access to sensitive artifact data. The CVSS 3.1 score of 4.3 reflects a network exploitable vulnerability with low complexity, requiring privileges but no user interaction, and impacting confidentiality only, without affecting integrity or availability. No known exploits are currently reported in the wild. This vulnerability could lead to unauthorized disclosure of sensitive project or development information, potentially exposing intellectual property or internal communications. The issue has been addressed in the specified patched versions of Tuleap Community and Enterprise Editions.

For European organizations using Tuleap for software development and project collaboration, this vulnerability poses a risk of unauthorized disclosure of confidential project artifacts. Such information leakage could compromise intellectual property, reveal sensitive design or development details, or expose internal communications. This may lead to competitive disadvantages, reputational damage, or compliance issues under data protection regulations such as GDPR if personal or sensitive data is inadvertently exposed. Since Tuleap is often used in regulated industries and government projects within Europe, unauthorized access to confidential artifacts could have legal and operational consequences. However, the impact is limited to confidentiality and does not affect system integrity or availability, reducing the risk of broader operational disruption.

European organizations should promptly upgrade affected Tuleap installations to the fixed versions: Community Edition 16.9.99.1752585665 or later, and Enterprise Edition 16.8-6 or 16.9-5 or later. Until upgrades are applied, organizations should audit user permissions and restrict access to sensitive artifacts to only trusted users. Implement strict role-based access controls and monitor access logs for unusual activity. Additionally, consider network segmentation to limit exposure of Tuleap servers and enforce strong authentication mechanisms. Regularly review and update authorization policies within Tuleap to ensure they align with the principle of least privilege. Since no public exploits are known, proactive patching and access control enforcement are critical to prevent potential exploitation.