CVE-2025-64499 is a Cross-Site Request Forgery (CSRF) vulnerability identified in Enalean's Tuleap software, a widely used open-source platform for software development management and collaboration. The vulnerability exists in the planning management API of Tuleap Community Edition versions prior to 17.0.99.1762456922 and Enterprise Edition versions prior to 17.0-2, 16.13-7, and 16.12-10. CSRF attacks exploit the trust a web application places in a user's browser by tricking authenticated users into submitting unwanted requests. In this case, an attacker with limited privileges and requiring user interaction can craft malicious requests that cause the victim's browser to create, modify, or delete project plans without their consent. Although the vulnerability does not expose confidential information (no confidentiality impact), it compromises data integrity and availability by allowing unauthorized changes to project plans. The CVSS v3.1 score of 4.6 reflects a medium severity, considering the attack vector is network-based, requires low privileges, and user interaction, but does not escalate privileges or cause confidentiality loss. No known exploits have been reported in the wild, but the vulnerability poses a risk to organizations relying on Tuleap for critical project management. The issue has been addressed in the latest Community and Enterprise Edition releases, and users are advised to upgrade promptly.

For European organizations, the impact of this vulnerability primarily concerns the integrity and availability of project planning data within Tuleap environments. Unauthorized modification or deletion of project plans can disrupt software development workflows, cause project delays, and lead to misallocation of resources. In regulated industries or organizations with strict compliance requirements, such unauthorized changes could also have legal or contractual implications. While confidentiality is not directly impacted, the disruption to project management processes can indirectly affect operational security and business continuity. Organizations using vulnerable versions of Tuleap in Europe, especially those with distributed teams relying heavily on collaborative planning, may experience significant operational disturbances if exploited. The requirement for user interaction and limited privileges reduces the likelihood of widespread automated exploitation but does not eliminate targeted attacks, particularly insider threats or social engineering campaigns.

To mitigate this vulnerability, European organizations should immediately upgrade to the fixed versions of Tuleap Community Edition (17.0.99.1762456922 or later) and Enterprise Edition (17.0-2, 16.13-7, 16.12-10 or later). Beyond patching, organizations should implement strict CSRF protections such as enforcing anti-CSRF tokens on all state-changing API endpoints, especially the planning management API. Reviewing and tightening user privilege assignments can reduce the attack surface, ensuring only necessary users have permissions to modify plans. Implementing Content Security Policy (CSP) headers and SameSite cookie attributes can further reduce CSRF risks. Additionally, user awareness training to recognize phishing or social engineering attempts that could trigger CSRF attacks is recommended. Monitoring and logging API usage for anomalous activity related to plan modifications can help detect exploitation attempts early. Finally, organizations should conduct regular security assessments of their Tuleap deployments to ensure compliance with security best practices.