CVE-2025-48991 is a Cross-Site Request Forgery (CSRF) vulnerability affecting Enalean's Tuleap software, an open-source suite designed to facilitate software development management and team collaboration. The vulnerability exists in versions prior to 16.8.99.1748845907 for the Community Edition and prior to 16.8-3 and 16.7-5 for the Enterprise Edition. CSRF vulnerabilities allow an attacker to trick an authenticated user into submitting unauthorized requests to the application without their consent. In this case, the attacker could manipulate the victim into changing 'canned responses'—predefined text snippets used to streamline communication or issue tracking within Tuleap. Although the vulnerability does not directly compromise confidentiality, it impacts the integrity and availability of the application by allowing unauthorized modifications to configuration or communication templates. Exploitation requires the victim to be authenticated with at least limited privileges (PR:L) and to interact with a maliciously crafted link or webpage (UI:R). The attack vector is network-based (AV:N), and the vulnerability scope is unchanged (S:U), meaning the impact is confined to the vulnerable component. The CVSS v3.1 base score is 4.6, indicating a medium severity level. No known exploits are currently reported in the wild. The vulnerability was publicly disclosed on June 25, 2025, and fixed in the specified patched versions. The root cause is the lack of adequate anti-CSRF protections in the affected versions, allowing state-changing requests to be executed without proper verification of the request origin or intent.

For European organizations using Tuleap, especially those relying on it for managing software development and collaboration workflows, this vulnerability could lead to unauthorized alterations of canned responses. While this may seem minor, such changes can disrupt communication efficiency, introduce misleading or incorrect information in issue tracking or customer support processes, and potentially degrade trust in the platform. In environments where Tuleap is integrated with other development or operational tools, manipulated responses could propagate errors or misconfigurations downstream. Although the vulnerability does not allow direct data exfiltration or system takeover, the integrity compromise could facilitate social engineering or further attacks by confusing users or masking malicious activity. Organizations with strict compliance requirements or those operating in regulated sectors may face audit or operational risks if such unauthorized changes go undetected. The requirement for user interaction and authenticated access limits the attack surface but does not eliminate risk, particularly in large teams or environments where users may be targeted via phishing or malicious websites. The absence of known exploits reduces immediate threat but does not preclude future exploitation attempts.

1. Upgrade Tuleap installations to the fixed versions: Community Edition 16.8.99.1748845907 or Enterprise Editions 16.8-3 and 16.7-5 as soon as possible to ensure built-in CSRF protections are applied. 2. Implement strict Content Security Policy (CSP) headers and SameSite cookie attributes to reduce the risk of CSRF attacks by limiting cross-origin requests. 3. Educate users about phishing and social engineering tactics that could lead to inadvertent interaction with malicious links or pages. 4. Review and monitor changes to canned responses and other critical configuration elements via audit logs or change management processes to detect unauthorized modifications promptly. 5. Where feasible, enforce multi-factor authentication (MFA) to reduce the risk of compromised credentials being used in conjunction with CSRF attacks. 6. Consider deploying Web Application Firewalls (WAFs) with rules tuned to detect and block suspicious CSRF patterns or anomalous POST requests targeting Tuleap endpoints. 7. For organizations with custom Tuleap integrations, verify that API endpoints and webhooks also implement CSRF protections or token-based validation to prevent abuse. 8. Regularly review and minimize user privileges to ensure that only necessary personnel have the ability to modify canned responses or other sensitive settings.