CVE-2025-62971 identifies a stored cross-site scripting (XSS) vulnerability in CrestaProject's Attesa Extra software, affecting versions up to and including 1.4.5. The vulnerability stems from improper neutralization of input during web page generation, which allows malicious input to be stored and later rendered in a web page without adequate sanitization. This flaw enables attackers with limited privileges (PR:L) to inject malicious scripts that execute in the context of other users' browsers when they interact with the affected web pages (UI:R). The vulnerability impacts confidentiality, integrity, and availability by potentially allowing session hijacking, defacement, or redirection to malicious sites. The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L) indicates network attack vector, low attack complexity, required privileges, user interaction, and scope change, with partial impacts on confidentiality, integrity, and availability. No known exploits have been reported in the wild, but the vulnerability's presence in a project management tool used in enterprise environments raises concerns about potential targeted attacks. The lack of available patches at the time of publication necessitates immediate mitigation efforts to reduce risk.

For European organizations, the impact of CVE-2025-62971 can be significant, especially for those relying on Attesa Extra for project management or collaboration. Stored XSS vulnerabilities can lead to unauthorized access to user sessions, data leakage, and the spread of malware within corporate networks. The compromise of user credentials or session tokens can facilitate lateral movement and further exploitation. Given the medium severity and the requirement for user interaction, the risk is moderate but non-negligible. Organizations in sectors such as finance, government, and critical infrastructure, where sensitive data is handled, may face increased risk. Additionally, the cross-site scripting vulnerability can undermine user trust and lead to reputational damage. The potential for scope change (S:C) means that the vulnerability could affect components beyond the initially compromised web page, increasing the attack surface.

European organizations should implement the following specific mitigations: 1) Monitor CrestaProject's official channels for patches and apply them promptly once released. 2) Until patches are available, deploy Web Application Firewalls (WAFs) with custom rules to detect and block typical XSS payloads targeting Attesa Extra. 3) Conduct thorough input validation and output encoding on all user-supplied data within the application environment, if customization or internal development is possible. 4) Implement Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers accessing the application. 5) Educate users about the risks of interacting with suspicious links or inputs within the platform to reduce successful exploitation via user interaction. 6) Regularly audit logs and monitor for unusual activities that may indicate exploitation attempts. 7) Consider isolating or segmenting the Attesa Extra deployment to limit potential lateral movement in case of compromise.