CVE-2022-31063 is a cross-site scripting (XSS) vulnerability identified in Enalean's Tuleap software, an open-source suite designed to facilitate software development management and team collaboration. The vulnerability affects versions prior to 13.9.99.111. Specifically, the issue arises because the title of a document is not properly escaped in two contexts: the search results displayed by the MyDocmanSearch widget and the administration page for locked documents. This improper neutralization of input (classified under CWE-79) allows a malicious user who has the capability to create documents within the Tuleap environment to inject and execute arbitrary scripts in the browsers of other users who view the affected pages. The exploitation does not require elevated privileges beyond document creation rights, but it does require the attacker to have authenticated access to the system to create malicious documents. Once exploited, the attacker can execute arbitrary JavaScript code in the context of the victim’s browser session, potentially leading to session hijacking, unauthorized actions on behalf of the victim, or theft of sensitive information accessible through the web application. There are no known workarounds for this vulnerability, and users are strongly advised to upgrade to version 13.9.99.111 or later where the issue has been fixed. No public exploits have been reported in the wild as of the publication date, but the vulnerability’s presence in a collaboration and project management tool makes it a noteworthy risk, especially in environments where multiple users interact and share sensitive project data.

For European organizations using Tuleap, this vulnerability poses a moderate risk primarily to confidentiality and integrity. Since Tuleap is used for managing software development projects and collaboration, exploitation could lead to unauthorized disclosure of project details, intellectual property, or credentials if session tokens or cookies are stolen. Integrity could be compromised if attackers perform unauthorized actions on behalf of users, such as modifying project documents or settings. Availability impact is limited as the vulnerability does not directly cause denial of service. The risk is heightened in organizations with many users having document creation privileges, as the attacker must be authenticated to exploit the flaw. Given the collaborative nature of Tuleap, successful exploitation could facilitate lateral movement or further attacks within the organization’s network. The absence of known exploits in the wild reduces immediate risk but does not eliminate the potential for targeted attacks, especially in sectors with high-value intellectual property or regulated data. European organizations involved in software development, particularly those in critical infrastructure, finance, or government sectors, should consider this vulnerability significant enough to warrant prompt remediation.

1. Immediate upgrade to Tuleap version 13.9.99.111 or later is the most effective mitigation, as the vendor has addressed the improper input escaping in these versions. 2. Restrict document creation permissions to only trusted users to reduce the attack surface, limiting the ability of potential attackers to inject malicious content. 3. Implement Content Security Policy (CSP) headers on Tuleap web servers to restrict the execution of unauthorized scripts, which can mitigate the impact of XSS attacks even if malicious scripts are injected. 4. Conduct regular security training for users with document creation rights to recognize and report suspicious content or behavior. 5. Monitor web application logs for unusual document creation activities or anomalous user behavior that could indicate exploitation attempts. 6. Employ web application firewalls (WAF) with rules tuned to detect and block common XSS payloads targeting Tuleap. 7. If upgrading immediately is not feasible, consider isolating the Tuleap instance within a segmented network zone with strict access controls to limit exposure. 8. Review and sanitize all user-generated content inputs beyond the affected components to proactively reduce risk from similar vulnerabilities.